Description: Drag and Drop Component Suite Version 4.1 Field test 5, released 16-dec-2001 ?1997-2001 Angus Johnson & Anders Melander http://www.melander.dk/delphi/dragdrop/ ------------------------------------------- Table of Contents: ------------------------------------------- 1. Supported platforms 2. Installation 3. Getting started 4. Known problems 5. Support and feedback 6. Bug reports 7. Upgrades and bug fixes 8. Missing in this release 9. New in version 4.x 10. TODO 11. Licence, Copyright and Disclaimer 12. Release history ------------------------------------------- 1. Supported platforms: ------------------------------------------- This release supports Delphi 4-6 and C++ Builder 4-5. Earlier versions of Delphi and C++ Builder will not be supported. If you need Delphi 3 or C++ Builder 3 support you will have to revert to version 3.7 of the Drag and Drop Component Suite. The library has been tested on NT4 service pack 5 and Windows 2000. Windows 95, 98, ME and XP should be supported, but has not been tested. Linux and Kylix are not supported. There are *NO* plans to port the library to Kylix. The drag and drop protocols available on Linux are too much of a mess at this time. ------------------------------------------- 2. Installation: ------------------------------------------- 1) Before you do anything else, read the "Known problems" section of this document. 2) Install the source into a directory of your choice. The files are installed into three directories: DragDrop DragDrop\Components DragDrop\Demo 3) Install and compile the appropriate design time package. The design time packages are located in the Components directory. Each version of Delphi and C++ Builder has its own package; DragDropD6.dpk for Delphi 6, DragDropD5.dpk for Delphi 5, DragDropC5.bpk for C++ Builder 5, etc. 4) Add the Drag and Drop Component Suite components directory to your library path. 5) Load the demo project group: demo\dragdrop_delphi.bpg for Delphi 5 and 6 demo\dragdrop_bcb4.bpg for C++ Builder 4 demo\dragdrop_bcb5.bpg for C++ Builder 5 The project group contains all the demo applications. 6) If your version of Delphi does not support text format DFM files (e.g. Delphi 4 doesn't), you will have to use the convert.exe utility supplied with Delphi to convert all the demo form files to binary format. A batch file, convert_forms_to delphi_4_format.bat, is supplied in the demo directory which automates the conversion process. The C++ Builder demo forms are distributed in binary format. 7) If upgrading from a previous version of the Drag and Drop Component Suite, please read the document "upgrading_to_v4.txt" before you begin working on your existing projects. Note about "Property does not exist" errors: Since all demos were developed with the latest version of Delphi, most of the demo forms probably contains references to properties that doesn't exist in earlier versions of Delphi and C++ Builder. Because of this you will get fatal run-time errors (e.g. "Error reading blahblahblah: Property does not exist.") if you attemt to run the demos without fixing this problem. Luckily it is very easy to make the forms work again; Just open the forms in the IDE, then select "Ignore All" when the IDE complains that this or that property doesn't exist and finally save the forms. ------------------------------------------- 3. Getting started: ------------------------------------------- It is recommended that you start by running each of the demo applications and then look through the demo source. Each demo application is supplied with a readme.txt file which briefly describes what the demo does and what features it uses. The demos should be run in the order in which they are listed in the supplied project group. Even if you have used previous versions of the Drag and Drop Component Suite it would be a good idea to have a quick look at the demos. The library has been completely rewritten and a lot of new features has been added. ------------------------------------------- 4. Known problems: ------------------------------------------- * The Shell Extension components does not support C++ Builder 4. For some strange reason the components causes a link error. * There appear to be sporadic problems compiling with C++ Builder 5. Several user have reported that they occasionally get one or more of the following compiler errors: [C++ Error] DragDropFile.hpp(178): E2450 Undefined structure '_FILEDESCRIPTORW' [C++ Error] DropSource.hpp(135): E2076 Overloadable operator expected I have not been able to reproduce these errors, but I believe the following work around will fix the problem: In the project options of *all* projects which uses these components, add the following conditional define: NO_WIN32_LEAN_AND_MEAN The define *must* be made in the project options. It is not sufficient to #define it in the source. If you manage to compile with C++ Builder (any version), I would very much like to know about it. * Delphi's and C++ Builder's HWND and THandle types are not compatible. For this reason it might be nescessary to cast C++ Builder's HWND values to Delphi's THandle type when a HWND is passed to a function. E.g.: if (DragDetectPlus(THandle(MyControl->Handle), Point(X, Y))) { ... } * Virtual File Stream formats can only be pasted from the clipboard with live data (i.e. FlushClipboard/OleFlushClipboard hasn't been called on the data source). This problem affects TFileContentsStreamOnDemandClipboardFormat and the VirtualFileStream demo. This is believed to be a bug in the Windows clipboard and a work around hasn't been found yet. * Asynchronous targets appears to be broken in the current release. * When TDropFileTarget.GetDataOnEnter is set to True, the component doesn't work with WinZip. Although the file names are received correctly by TDropFileTarget, WinZip doesn't extract the files and the files thus can't be copied/moved. This is caused by a quirk in WinZip; Apparently WinZip doesn't like IDataObject.GetData to be called before IDropTarget.Drop is called. ------------------------------------------- 5. Support and feedback: ------------------------------------------- Since these components are freeware they are also unsupported. You are welcome to ask for help via email, but I cannot guarantee that I will have time to help you or even reply to your mail. If you absolytely can't live without my help, you can alway try bribing me. You can also try asking for help in the Delphi newsgroups. Since the Drag and Drop Component Suite is in widespread use, there's a good chance another user can help you. I recommend the following newsgroups for issues regarding this library (or COM based Drag/Drop in general): borland.public.delphi.winapi borland.public.delphi.thirdparty-tools borland.public.delphi.oleautomation borland.public.cppbuilder.winapi borland.public.cppbuilder.thirdparty-tools Please choose the most appropiate newsgroup for your question. Do not cross post to them all. Before posting to the newsgroups, I suggest you try to search for an answer on the Google (DejaNews) search engine: http://groups.google.com Chances are that your question has been asked and answered before. If you have suggestions for improvements please mail them to me: anders@melander.dk Please include the words "Drag Drop" in the subject of any email regarding these components. ------------------------------------------- 6. Bug reports: ------------------------------------------- Bugs can either be reported at my home page (http://www.melander.dk/) or mailed directly to me: anders@melander.dk. When reporting a bug, please provide the following information: * The exact version of the Drag and Drop Component Suite you are using. * The exact version of Delphi or C++ Builder you are using. * The name and exact version of your operating system (e.g. NT4 SP5). * The exact version of the Internet Explorer installed on your system. If you can provide me with a minimal application which reproduces the problem, I can almost guarantee that I will be able to fix the problem in very short time. Please supply only the source files (pas, dfm, dpr, dof, res, etc.) and mail them as a single zip file. If I need a compiled version I will ask for it. If you feel you need to send me a screen shot, please send it in GIF or PNG format. If you mail a bug report to me, please include the words "Drag Drop" in the subject of your email. ------------------------------------------- 7. Upgrades and bug fixes: ------------------------------------------- Upgrades can be downloaded from my home page: http://www.melander.dk/delphi/dragdrop/ Bug fixes will also be posted to the above page. If you have registered for update notification via the installation program, you will receive email notification when a new release is available. You will not be notified of bug fixes. You can use the installation program to check for and download new releases and to check for known bugs. Note: If a new release is made available and you are not notified even though you registered for notification, you probably mistyped your email address during installation; About 10% of all registrations supply an invalid email address. ------------------------------------------- 8. Missing in this release: ------------------------------------------- * On-line help has not been updated and included in the kit due to late changes in the Delphi 6 help system and lack of time. If time permits, I will update the help and include it in a future release. ------------------------------------------- 9. New in version 4.x: ------------------------------------------- * Completely redesigned and rewritten. Previous versions of the Drag and Drop Component Suite used a very monolithic design and flat class hierachy which made it a bit cumbersome to extend the existing components or implement new ones. Version 4 is a complete rewrite and redesign, but still maintains compatibility with previous versions. The new V4 design basically separates the library into three layers: 1) Clipboard format I/O. 2) Data format conversion and storage. 3) COM Drag/Drop implementation and VCL component interface. The clipboard format layer is responsible for reading and writing data in different formats to and from an IDataObject interface. For each different clipboard format version 4 implements a specialized class which knows exactly how to interpret the clipboard format. For example the CF_TEXT (plain text) clipboard format is handled by the TTextClipboardFormat class and the CF_FILE (file names) clipboard format is handled by the TFileClipboardFormat class. The data format layer is primarily used to render the different clipboard formats to and from native Delphi data types. For example the TTextDataFormat class represents all text based clipboard formats (e.g. TTextClipboardFormat) as a string while the TFileDataFormat class represents a list of file names (e.g. TFileClipboardFormat) as a string list. The conversion between different data- and clipboard formats is handled by the same Assign/AssignTo mechanism as the VCLs TPersistent employes. This makes it possible to extend existing data formats with support for new clipboard formats without modification to the existing classes. The drag/drop component layer has several tasks; It implements the actual COM drag/drop functionality (i.e. it implements the IDropSource, IDropTarget and IDataObject interfaces (along with several other related interfaces)), it surfaces the data provided by the data format layer as component properties and it handles the interaction between the whole drag/drop framework and the users code. The suite provides a multitude of different components. Most are specialized for different drag/drop tasks (e.g. the TDropFileTarget and TDropFilesSource components for drag/drop of files), but some are either more generic, handling multiple unrelated formats, or simply helper components which are used to extend the existing components or build new ones. * Support for Delphi 6. Version 4.0 was primarily developed on Delphi 6 and then ported back to previous versions of Delphi and C++ Builder. * Support for Windows 2000 inter application drag images. On Windows platforms which supports it, drag images are now displayed when dragging between applications. Currently only Windows 2000 supports this feature. On platforms which doesn't support the feature, drag images are only displayed whithin the source application. * Support for Windows 2000 asynchronous data transfers. Asynchronous data tranfers allows the drop source and targets to perform slow transfers or to transfer large amounts of data without blocking the user interface while the data is being transfered. For platforms other than Windows 2000, the new TDropSourceThread class can be used to provide similar (but more limited) asynchronous data transfer capabilities. * Support for optimized and non-optimized move. When performing drag-move operations, it is now possible to specify if the target (optimized move) or the source (non-optimized move) is responsible for deleting the source files. * Support for delete-on-paste. When data is cut to the clipboard, it is now possible to defer the deletion of the source data until the target actually pastes the data. The source is notified by an event when the target pastes the data. * Extended clipboard support. All formats and components (both source and target) now support clipboard operations (copy/cut/paste) and the VCL clipboard object. * Support for shell drop handlers. The new TDropHandler component can be used to write drop handler shell extensions. A drop handler is a shell extension which is executed when a user drags and drops one or more files on a file associated wth your application. * Support for shell drag drop handlers. The new TDragDropHandler component can be used to write drag drop handler shell extensions. A drag drop handler is a shell extension which can extend the popup menu which is displayed when a user drag and drops files with the right mouse button. * Support for shell context menu handlers. The new TDropContextMenu component can be used to write context menu handler shell extensions. A context menu handler is a shell extension which can extend the popup menu which is displayed when a user right-clicks a file in the shell. * Drop sources can receive data from drop targets. It is now possible for drop targets to write data back to the drop source. This is used to support optimized-move, delete-on-paste and inter application drag images. * Automatic re-registration of targets when the target window handle is recreated. In previous versions, target controls would loose their ability to accept drops when their window handles were recreated by the VCL (e.g. when changing the border style or docking a form). This is no longer a problem. * Support for run-time definition of custom data formats. You can now add support for new clipboard formats without custom components. * Support for design-time extension of existing source and target components. Using the new TDataFormatAdapter component it is now possible to mix and match data formats and source and target components at design time. E.g. the TDropFileTarget component can be extended with URL support. * It is now possible to completely customize the target auto-scroll feature. Auto scroling can now be completely customized via the OnDragEnter, OnDragOver, OnGetDropEffect and OnScroll events and the public NoScrollZone and published AutoScroll properties. * Multiple target controls per drop target component. In previous versions you had to use one drop target component per target control. With version 4, each drop target component can handle any number of target controls. * It is now possible to specify the target control at design time. A published Target property has been added to the drop target components. * Includes 20 components: - TDropFileSource and TDropFileTarget Used for drag and drop of files. Supports recycle bin and PIDLs. - TDropTextSource and TDropTextTarget Used for drag and drop of text. - TDropBMPSource and TDropBMPTarget Used for drag and drop of bitmaps. - TDropPIDLSource and TDropPIDLTarget Used for drag and drop of PIDLs in native format. - TDropURLSource and TDropURLTarget Used for drag and drop of internet shortcuts. - TDropDummyTarget Used to provide drag/drop cursor feedback for controls which aren't registered as drop targets. - TDropComboTarget (new) Swiss-army-knife target. Accepts text, files, bitmaps, meta files, URLs and file contents. - TDropMetaFileTarget (new) Target which can accept meta files and enhanced meta files. - TDropImageTarget (new) Target which can accept bitmaps, DIBs, meta files and enhanced meta files. - TDragDropHandler (new) Used to implement Drag Drop Handler shell extensions. - TDropHandler (new) Used to implement Shell Drop Handler shell extensions. - TDragDropContext (new) Used to implement Shell Context Menu Handler shell extensions. - TDataFormatAdapter (new) Extends the standard source and target components with support for extra data formats. An alternative to TDropComboTarget. - TDropEmptySource and TDropEmptyTarget (new) Target and source components which doesn't support any formats, but can be extended with TDataFormatAdapter components. * Supports 27 standard clipboard formats: Text formats: - CF_TEXT (plain text) - CF_UNICODETEXT (Unicode text) - CF_OEMTEXT (Text in the OEM characterset) - CF_LOCALE (Locale specification) - 'Rich Text Format' (RTF text) - 'CSV' (Tabular spreadsheet text) File formats: - CF_HDROP (list of file names) - CF_FILEGROUPDESCRIPTOR, CF_FILEGROUPDESCRIPTORW and CF_FILECONTENTS (list of files and their attributes and content). - 'Shell IDList Array' (PIDLs) - 'FileName' and 'FileNameW' (single filename, used for 16 bit compatibility). - 'FileNameMap' and 'FileNameMapW' (used to rename files, usually when dragging from the recycle bin) Image formats: - CF_BITMAP (Windows bitmap) - CF_DIB (Device Independant Bitmap) - CF_METAFILEPICT (Windows MetaFile) - CF_ENHMETAFILE (Enhanced Metafile) - CF_PALETTE (Bitmap palette) Internet formats: - 'UniformResourceLocator' and 'UniformResourceLocatorW' (Internet shortcut) - 'Netscape Bookmark' (Netscape bookmark/URL) - 'Netscape Image Format' (Netscape image/URL) - '+//ISBN 1-887687-00-9::versit::PDI//vCard' (V-Card) - 'HTML Format' (HTML text) - 'Internet Message (rfc822/rfc1522)' (E-mail message in RFC822 format) Misc. formats: - CF_PREFERREDDROPEFFECT and CF_PASTESUCCEEDED (mostly used by clipboard) - CF_PERFORMEDDROPEFFECT and CF_LOGICALPERFORMEDDROPEFFECT (mostly used for optimized-move) - 'InShellDragLoop' (used by Windows shell) - 'TargetCLSID' (Mostly used when dragging to recycle-bin) * New source events: - OnGetData: Fired when the target requests data. - OnSetData: Fired when the target writes data back to the source. - OnPaste: Fired when the target pastes data which the source has placed on the clipboard. - OnAfterDrop: Fired after the drag/drop operation has completed. * New target events: - OnScroll: Fires when the target component is about to perform auto-scroll on the target control. - OnAcceptFormat: Fires when the target component needs to determine if it will accept a given data format. Only surfaced in the TDropComboTarget component. * 8 new demo applications, 19 in total. ------------------------------------------- 10. TODO (may or may not be implemented): ------------------------------------------- * Async target demo (with and without IAsyncOperation support). * Scrap file demo. * Native Outlook message format. * Structured storage support (IStorage encapsulation). ------------------------------------------- 11. Licence, Copyright and Disclaimer: ------------------------------------------- The Drag and Drop Component Suite is Copyright ?1997-2001 Angus Johnson and Anders Melander. All rights reserved. The software is copyrighted as noted above. It may be freely copied, modified, and redistributed, provided that the copyright notice(s) is preserved on all copies. The Drag and Drop Component Suite is freeware and we would like it to remain so. This means that it may not be bundled with commercial libraries or sold as shareware. You are welcome to use it in commercial and shareware applications providing you do not charge for the functionality provided by the Drag and Drop Component Suite. There is no warranty or other guarantee of fitness for this software, it is provided solely "as is". You are welcome to use the source to make your own modified components, and such modified components may be distributed by you or others if you include credits to the original components, and do not charge anything for your modified components. ------------------------------------------- 12. Version 4 release history: ------------------------------------------- 16-dec-2001 * Ported to C++ Builder 4. * Released for test as v4.1 FT5. 12-dec-2001 * Fixed C++ Builder name clash between TDropComboTarget.GetMetaFile and the GetMetaFile #define in wingdi.h 1-dec-2001 * The IAsyncOperation interface is now also declared as IAsyncOperation2 and all references to IAsyncOperation has been replaced with IAsyncOperation2. This was done to work around a bug in C++ Builder. Thanks to Jonathan Arnold for all his help with getting the components to work with C++ Builder. Without Jonathan's help version 4.1 would prabably have shipped witout C++ Builder support and certainly without any C++ Builder demos. * Demo applications for C++ Builder. The C++ Builder demos were contributed by Jonathan Arnold. 27-nov-2001 * TCustomDropTarget.Droptypes property renamed to DropTypes (notice the case). Thanks to Krystian Brazulewicz for spotting this. 24-nov-2001 * The GetURLFromString function in the DragDropInternet unit has been made public due to user request. 21-nov-2001 * Modified MakeHTML function to comply with Microsoft's description of the CF_HTML clipboard format. * Added MakeTextFromHTML function to convert CF_HTML data to plain HTML. Provides the reverse functionality of MakeHTML. * Added HTML support to TTextDataFormat class and TDropTextSource and TDropTextTarget components. * Fixed C++ Builder 5 problem with IAsyncOperation. * Released for test as v4.1 FT4. 10-nov-2001 * Added NetscapeDemo demo application. Demonstrates how to receive messages dropped from Netscape. This demo was sponsored by ThoughtShare Communications Inc. * Released for test as v4.1 FT3. 23-oct-2001 * Conversion priority of TURLDataFormat has been changed to give the File Group Descritor formats priority over the Internet Shortcut format. This resolves a problem where dropping an URL on the desktop would cause the desktop to assume that an Active Desktop item was to be created instead of an Internet Shortcut. Thanks to Allen Martin for reporting this problem. By luck this modification also happens to work around a bug in Mozilla and Netscape 6; Mozilla incorrectly supplies the UniformResourceLocator clipboard format in unicode format instead of ANSI format. Thanks to Florian Kusche for reporting this problem. * Added support for TFileGroupDescritorWClipboardFormat to TURLDataFormat. * Added declaration of FD_PROGRESSUI to DragDropFormats. * Added TURLWClipboardFormat which implements the "UniformResourceLocatorW" (a.k.a. CFSTR_INETURLW) clipboard format. Basically a Unicode version of CFSTR_SHELLURL/CFSTR_INETURL. The TURLWClipboardFormat class isn't used anywhere yet but will probably be supported by TURLDataFormat (and thus TDropURLTarget/TDropURLSource) in a later release. * Added experimental Shell Drag Image support. This relies on undodumented shell32.dll functions and probably won't be fully support before v4.2 (if ever). See InitShellDragImage in DropSource.pas. Thanks to Jim Kueneman for bringning these functions to my attention. 13-oct-2001 * TCustomDropSource.Destroy and TCustomDropMultiSource.Destroy changed to call FlushClipboard instead of EmptyClipboard. This means that clipboard contents will be preserved when the source application/component is terminated. * Added clipboard support to VirtualFileStream demo. * Modified VirtualFileStream demo to work around clipboard quirk with IStream medium. * Modified TCustomSimpleClipboardFormat to disable TYMED_ISTORAGE support by default. At present TYMED_ISTORAGE is only supported for drop targets and enabling it by default in TCustomSimpleClipboardFormat.Create caused a lot of clipboard operations (e.g. copy/paste of text) to fail. Thanks to Michael J Marshall for bringing this problem to my attention. * Modified TCustomSimpleClipboardFormat to read from the the TYMED_ISTREAM medium in small (1Mb) chunks and via a global memory buffer. This has resultet in a huge performance gain (several orders of magnitude) when transferring large amounts of data via the TYMED_ISTREAM medium. 3-oct-2001 * Fixed bug in TCustomDropSource.SetImageIndex. Thanks to Maxim Abramovich for spotting this. * Added missing default property values to TCustomDropSource. Thanks to Maxim Abramovich for spotting this. * DragDrop.pas and DragDropContext.pas updated for Delphi 4. * Reimplemented utility to convert DFM form files from Delphi 5/6 test format to Delphi 4/5 binary format. * Improved unregistration of Shell Extensions. Shell extension now completely (and safely) remove their registry entries when unregistered. * Deprecated support for C++ Builder 3. * Released for test as v4.1 FT2. 25-sep-2001 * Rewritten ContextMenuHandlerShellExt demo. The demo is now actually a quite useful utility which can be used to register and unregister ActiveX controls, COM servers and type libraries. It includes the same functionality as Borland's TRegSvr utility. 20-sep-2001 * Added support for cascading menus, ownerdraw and menu bitmaps to TDropContextMenu component. * Modified TFileContentsStreamOnDemandClipboardFormat to handle invalid parameter value (FormatEtcIn.lindex) when data is copied to clipboard. This works around an apparent bug in the Windows clipboard. Thanks to Steve Moss for reporting this problem. * Modified TEnumFormatEtc class to not enumerate empty clipboard formats. Thanks to Steve Moss for this improvement. 1-sep-2001 * Introduced TCustomDropTarget.AutoRegister property. The AutoRegister property is used to control if drop target controls should be automatically unregistered and reregistered when their window handle is recreated by the VCL. If AutoRegister is True, which is the default, then automatic reregistration will be performed. This property was introduced because the hidden child control, which is used to monitor the drop target control's window handle, can have unwanted side effects on the drop target control (e.g. TToolBar). * Deprecated support for Delphi 3. 22-jun-2001 * Redesigned TTextDataFormat to handle RTF, Unicode, CSV and OEM text without conversion. Moved TTextDataFormat class to DragDropText unit. Added support for TLocaleClipboardFormat. * Surfaced new text formats as properties in TDropTextSource and TDropTextTarget. Previous versions of the Text source and target components represented all supported text formats via the Text property. In order to enable users to handle the different text formats independantly, the text source and target components now has individual properties for ANSI, OEM, Unicode and RTF text formats. The text target component can automatically synthesize some of the formats from the others (e.g. OEM text from ANSI text), but applications which previously relied on all formats being represented by the Text property will have to be modified to handle the new properties. * Added work around for problem where TToolBar as a drop target would display the invisible target proxy window. * Fixed wide string bug in WriteFilesToZeroList. Thanks to Werner Lehmann for spotting this. 15-jun-2001 * Added work-around for Outlook Express IDataObject.QueryGetData quirk. 3-jun-2001 * Ported to C++ Builder 4 and 5. * Added missing DragDropDesign.pas unit to design time packages. * First attempt at C++ Builder 3 port.... failed. * Improved handling of oversized File Group Descriptor data. * Added support for IStorage medium to TFileContentsStreamClipboardFormat. This allows the TDropComboTarget component to accept messages dropped from Microsoft Outlook. This work was sponsored by ThoughtShare Communications Inc. 23-may-2001 * Ported to Delphi 4. * First attempt at C++ Builder 5 port.... failed. 18-may-2001 * Released as version 4.0. Note: Version 4.0 was released exclusively on the Delphi 6 Companion CD. * ContextMenuDemo and DropHandlerDemo application has been partially rewritten and renamed. ContextMenuDemo is now named ContextMenuHandlerShellExt. DropHandlerDemo is now named DropHandlerShellExt. * TDropContextMenu component has been rewitten. The TDropContextMenu now implements a context menu handler shell extension. In previous releases it implemented a drag drop handler shell extension. * The DragDropHandler.pas unit which implements the TDropHandler component has been renamed to DropHandler.pas. * Added new TDragDropHandler component. The new component, which lives in the DragDropHandler unit, is used to implement drag drop handler shell extensions. * Added DragDropHandlerShellExt demo application. * Removed misc incomplete demos from kit. * Fixed minor problem in VirtualFileStream demo which caused drops from the VirtualFile demo not to transfer content correctly. 11-may-2001 * Converted all demo forms to text DFM format. This has been nescessary to maintain compatibility between all supported versions of Delphi. * Fixed a bug in GetPIDLsFromFilenames which caused drag-link of files (dtLink with TDropFileSource) not to work. * Added readme.txt files to some demo applications. * Added missing tlb and C++ Builder files to install kit. * Released as FT4. 6-may-2001 * Added missing dfm files to install kit. * Tested with Delphi 5. Fixed Delphi 5 compatibility error in main.dfm of DragDropDemo. * Removed misc compiler warnings. * The AsyncTransferTarget and OleObjectDemo demos were incomplete and has been removed from the kit for the V4.0 release. The demos will be included in a future release. * Released as FT3. 3-may-2001 * Added missing dpr and bpg files to install kit. * Updated readme.txt with regard to lack of C++ Builder demos. * Released as FT2. 29-apr-2001 * Cleaned up for release. * Released as FT1. 23-feb-2001 * Modified TCustomDropTarget.FindTarget to handle overlapping targets (e.g. different targets at the same position but on different pages of a page control or notebook). Thanks to Roger Moe for spotting this problem. 13-feb-2001 * Renamed AsyncTransfer2 demo to AsyncTransferSource. * Added AsyncTransferTarget demo. * Replaced TChart in AsyncTransfer2 demo with homegrown pie-chart-thing. * Modified all IStream based target formats to support incremental transfer. * URW533 problem has finally been fixed. The cause of the problem, which is a bug in Delphi, was found by Stefan Hoffmeister. * Fixed free notification for TDropContextmenu and TDataFormatAdapter. 27-dec-2000 * Moved TVirtualFileStreamDataFormat and TFileContentsStreamOnDemandClipboardFormat classes from VirtualFileStream demo to DragDropFormats unit. * Added TClipboardFormat.DataFormat and TClipboardFormats.DataFormat property. * Added TDropEmptySource and TDropEmptyTarget components. These are basically do-nothing components for use with TDataFormatAdapter. * Rewritten AsyncTransfer2 demo. The demo now uses TDropEmptySource, TDataFormatAdapter and TVirtualFileStreamDataFormat to transfer 10Mb of data with progress feedback. * Rewritten VirtualFileStream demo. The demo now uses TDropEmptySource, TDropEmptyTarget, TDataFormatAdapter and TVirtualFileStreamDataFormat. * Fixed memory leak in TVirtualFileStreamDataFormat. This leak only affected the old VirtualFileStream demo. * Added support for full File Descriptor attribute set to TVirtualFileStreamDataFormat. It is now possible to specify file attributes such as file size and last modified time in addition to the filename. I plan to add similar features to the other classes which uses FileDescriptors (e.g. TDropFileSource and TDropFileTarget). 21-dec-2000 * Ported to Delphi 4. * Added workaround for design bug in either Explorer or the clipboard. Explorer and the clipboard's requirements to the cursor position of an IStream object are incompatible. Explorer requires the cursor to be at the beginning of stream and the clipboard requires the cursor to be at the end of stream. 15-dec-2000 * Fixed URW533 problem. I'll leave the description of the workaround in here for now in case the problem resurfaces. 11-dec-2000 * Fixed bug in filename to PIDL conversion (GetPIDLsFromFilenames) which affected TDropFileTarget. Thanks to Poul Halgaard J鴕gensen for reporting this. 4-dec-2000 * Added THTMLDataFormat. * Fixed a a few small bugs which affected clipboard operations. * Added {$ALIGN ON} to dragdrop.inc. Apparently COM drag/drop requires some structures to be word alligned. This change fixes problems where some of the demos would suddenly stop working. * The URW533 problem has resurfaced. See the "Known problems" section below. 13-nov-2000 * TCopyPasteDataFormat has been renamed to TFeedbackDataFormat. * Added support for the Windows 2000 "TargetCLSID" format with the TTargetCLSIDClipboardFormat class and the TCustomDropSource.TargetCLSID property. * Added support for the "Logical Performed DropEffect" format with the TLogicalPerformedDropEffectClipboardFormat class. The class is used internally by TCustomDropSource. 30-oct-2000 * Added ContextMenu demo and TDropContextMenu component. Demonstrates how to customize the context menu which is displayed when a file is dragged with the right mouse button and dropped in the shell. * Added TCustomDataFormat.GetData. With the introduction of the GetData method, Data Format classes can now be used stand-alone to extract data from an IDataObject. 20-oct-2000 * Added VirtualFileStream demo. Demonstrates how to use the "File Contents" and "File Group Descritor" clipboard formats to drag and drop virtual files (files which doesn't exist physically) and transfer the data on-demand via a stream. 14-oct-2000 * Added special drop target registration of TCustomRichEdit controls. TCustomRichEdit needs special attention because it implements its own drop target handling which prevents it to work with these components. TCustomDropTarget now disables a rich edit control's built in drag/drop handling when the control is registered as a drop target. * Added work around for Windows bug where IDropTarget.DragOver is called regardless that the drop has been rejected in IDropTarget.DragEnter. 12-oct-2000 * Fixed bug that caused docking to interfere with drop targets. Thanks to G. Bradley MacDonald for bringing the problem to my attention. 30-sep-2000 * The DataFormats property has been made public in the TCustomDropMultiTarget class. * Added VirtualFile demo. Demonstrates how to use the TFileContentsClipboardFormat and TFileGroupDescritorClipboardFormat formats to drag and drop a virtual file (a file which doesn't exist physically). 28-sep-2000 * Improved drop source detection of optimized move. When an optimized move is performed by a drop target, the drop source's Execute method will now return drDropMove. Previously drCancel was returned. The OnAfterDrop event must still be used to determine if a move operation were optimized or not. * Modified TCustomDropTarget.GetPreferredDropEffect to get data from the current IDataObject instead of from the VCL global clipboard. 18-sep-2000 * Fixed bug in DropComboTarget caused by the 17-sep-2000 TStreams modification. 17-sep-2000 * Added AsyncTransfer2 demo to demonstrate use of TDropSourceThread. * Renamed TStreams class to TStreamList. 29-aug-2000 * Added TDropSourceThread. TDropSourceThread is an alternative to Windows 2000 asynchronous data transfers but also works on other platforms than Windows 2000. TDropSourceThread is based on code contributed by E. J. Molendijk. 24-aug-2000 * Added support for Windows 2000 asynchronous data transfers. Added IAsyncOperation implementation to TCustomDropSource. Added TCustomDropSource.AllowAsyncTransfer and AsyncTransfer properties. 5-aug-2000 * Added work around for URW533 compiler bug. * Fixed D4 and D5 packages and updated a few demos. Obsolete DropMultiTarget were still referenced a few places. * Documented work around for C++ Builder 5 compiler error. See the Known Problems section later in this document for more information. 2-aug-2000 * The package files provided in the kit is now design-time only packages. In previous versions, the packages could be used both at design- and run-time. The change was nescessary because the package now contains design-time code. * Added possible work around for suspected C++ Builder bug. The bug manifests itself as a "Overloadable operator expected" compile time error. See the "Known problems" section of this document. * Rewrote CustomFormat1 demo. * Added CustomFormat2 demo. * TDataDirection members has been renamed from ddGet and ddSet to ddRead and ddWrite. * All File Group Descritor and File Contents clipboard formats has been moved from the DragDropFile unit to the DragDropFormats unit. * File Contents support has been added to TTextDataFormat. The support is currently only enabled for drop sources. * Renamed TDropMultiTarget component to TDropComboTarget. Note: This will break applications which uses the TDropMultiTarget component. You can use the following technique to port application from previous releases: 1) Install the new components. 2) Repeat step 3-8 for all units which uses the TDropMultiTarget component. 3) Make a backup of the unit (both pas and dfm file) just in case... 4) Open the unit in the IDE. 5) In the .pas file, replace all occurances of "TDropMultiTarget" with "TDropComboTarget". 6) View the form as text. 7) Replace all occurances of "TDropMultiTarget" with "TDropComboTarget". 8) Save the unit. * Renamed a lot of demo files and directories. * Added work around for yet another bug in TStreamAdapter. * Added TCustomStringClipboardFormat as new base class for TCustomTextClipboardFormat. This changes the class hierachy a bit for classes which previously descended from TCustomTextClipboardFormat: All formats which needs zero termination now descend from TCustomTextClipboardFormat and the rest descend from TCustomStringClipboardFormat. Added TrimZeroes property. Fixed zero termination bug in TCustomTextClipboardFormat and generally improved handling of zero terminated strings. Disabled zero trim in TCustomStringClipboardFormat and enabled it in TCustomTextClipboardFormat. 23-jul-2000 * Improved handling of long file names in DropHandler demo. Added work around for ParamStr bug. * Added TDataFormatAdapter component and adapter demo. TDataFormatAdapter is used to extend the existing source and target components with additional data format support without modifying them. It can be considered an dynamic alternative to the current TDropMultiTarget component. 17-jul-2000 * TDropHandler component and DropHandler demo fully functional. 14-jul-2000 * Tested with C++ Builder 5. * Fixed sporadic integer overflow bug in DragDetectPlus function. * Added shell drop handler support with TDropHandler component. This is a work in progress and is not yet functional. 1-jul-2000 * Tested with Delphi 4. * Support for Windows 2000 inter application drag images. * TRawClipboardFormat and TRawDataFormat classes for support of arbitrary unknown clipboard formats. The classes are used internally in the TCustomDropSource.SetData method to support W2K drag images. Platform: |
Size: 2130304 |
Author:smj_9547 |
Hits:
Description:
中国移动通信集团公司最近已在上海、北京、天津、广州、杭州、深圳等六大城市同时开出WAP商用试验网，首期商用试验网的六大城市在3月25日-5月31日期间实行免费上网，6月1日后的WAP业务通信费标准将另行制定。WAP用户可以在这六大城市中使用WAP手机上网浏览WAP网站信息，这标志着我国有了自己的WAP网关，极大地促进了我国WAP服务行业的发展，也象征着我国无线通信技术进入了一个新的里程。-China Mobile Communications Corporation has recently been in Shanghai, Beijing, Tianjin, Guangzhou, Hangzhou, Shenzhen and other cities out of six commercial tests WAP network, the first commercial trial of the six major cities in the network March 25-5 31 during the introduction of free Internet access, June 1 the WAP business in future will be the development of communications standards. WAP users can use the six cities WAP mobile Internet browser WAP site information, which indicates that China has its own WAP gateway, greatly promoted China' s WAP service industries, but also a symbol of China' s wireless communications technology into the a new milestone. Platform: |
Size: 3072 |
Author:jiaogd |
Hits:
Description: Dede Enterprise Information Management System (简称DedeEIMS)是织梦科技为中
小型企业专门开发的一套建站系统，产品继承了织梦内容管理系统简单、易用的特点
，并且加入了如：多国语言、在线客服、招聘、产品订单等功能。
程序的内容创建获取及管理、安全灵活的程序架构，简单易懂的模板标签机制，方便
快捷的频道管理以及无限极拓展分类的需求，标准静态化更适合搜索引擎优化（SEO）
，让你能够轻松打造出专业的企业网站，帮你在互联网拓展公司业务，提升企业的核
心竞争力。-Dede Enterprise Information Management System (abbreviated as DedeEIMS) is weaving a dream technology specifically developed for small and medium enterprises a set of Station system, the product inherits Pursuing a dream content management system is simple, user-friendly features, and added such as: multi-language, on-line customer service, recruitment, product orders and other functions. Procedures for content creation and management, secure and flexible procedural framework, easy to understand template tag mechanism to facilitate efficient channel management, and classification of infinite expansion of demand for most, the standard more suitable for static-oriented search engine optimization (SEO), so that you can Easily build a professional business website to help you develop their business on the Internet to enhance the core competitiveness of enterprises. Platform: |
Size: 2821120 |
Author:陈勇 |
Hits:
Description: ActiveX 自启动方式有很多木马在使用，好象国内的比较少，最近突然多起来了
由于我一向在 网吧上网，内网肉鸡通常是上不了线的，所以需要端口映射，于是我在几台服务器肉鸡上装了 Vidc 这个东西，可惜 vidc 1.2 服务端是不会自己启动的，所以就需要动手改造。随便研究了一下，呵呵。安装为服务？注册表Run键？
[attach=130]
可惜现在是个鸟，无论 老鸟还是菜鸟都喜欢去查看这几个地方，加是什么 优化大师 的帮助，很快，改造的木马over了，其实我们不妨使用下 ActiveX 详细信息看下面的代码
Windows Registry Editor Version 5.00
[HKEY_LOCAL_MACHINESOFTWAREMicrosoftActive SetupInstalled Components{4A202188-F04D-11cf-64CD-31FFAFEECF20}]
"StubPath"="sunray.exe"
其中的 {4A202188-F04D-11cf-64CD-31FFAFEECF20} 即为启动键值，可以随机替换为合理的值
把上面的代码保存为 run.reg 导入注册表，每次开机就会启动 系统目录下的 sunray.exe -There are many ways since the launch of ActiveX Trojan in use, if the domestic is relatively small, the recent sudden increased recently in
As I have always been in the cafe Internet, Intranet chickens usually are not able to line, so the need for port mapping, so I have a few servers broiler upload a Vidc this thing, unfortunately vidc 1.2 server will not start their own, so we need to Hands-transformation. Casual study a little, He He. Installed as a service? Registry Run keys?
[attach = 130]
Unfortunately, now is a bird or a rookie like both fields and then go to see these places, plus What is the optimal master s help, quickly transform the Trojans over, but in fact we may use the following ActiveX For more information see the following code
Windows Registry Editor Version 5.00
[HKEY_LOCAL_MACHINESOFTWAREMicrosoftActive SetupInstalled Components (4A202188-F04D-11cf-64CD-31FFAFEECF20)]
"StubPath" = "sunray.exe"
Where (4A202188-F04D-11cf-64CD-31FFAFEECF20) shal Platform: |
Size: 3072 |
Author:Gougou |
Hits:
Description: windows xp internet 信息服务，IIS5.1，安装方法：在您的计算机上已经检测到“管理工具软件包”。在升级之前，请使用“添加/删除程序”将“管理工具软件包”删除。要从运行 Windows XP Professional 的计算机远程管理服务器服务，请使用“远程桌面”。-windows xp internet information services, IIS5.1, installation method: in your computer has been detected, " Administrative Tools package." Before the upgrade, please use the " Add/Remove Programs" to " Administrative Tools package" Delete. From a computer running Windows XP Professional Remote Management Server service, use the " Remote Desktop." Platform: |
Size: 12137472 |
Author:火山 |
Hits:
Description: Windows XP Internet 信息服务组件安装包(IIS5.1):
该包中包含Windows xp 安装盘I386文件夹内提取,只包含 IIS 信息服务组件.
一: IIS 5.1版本适用于Windows XP_SP1、XP_SP2、XP_SP3
二: ISS 5.1安装步骤(各版本IIS都可以按照该方法安装-Windows XP Internet Information Services component installation package (IIS5.1):
The package contains the Windows xp installation disk I386 folder extraction, information service contains only IIS component.
1: IIS 5.1 version for Windows XP_SP1, XP_SP2, XP_SP3
2: ISS 5.1 installation steps (each version of the IIS can be installed in accordance with the method Platform: |
Size: 13574144 |
Author:ww2222 |
Hits:
Description: 随着计算机科学的发展，数据库技术在Internet中的应用越来越广泛，为广大网络用户提供了更加周到和人性化的服务。个性化已逐渐成为当今Web应用的潮流。利用JSP技术开发的网站新闻管理系统，实现了网站新闻的动态管理，因为可以用来动态发布新闻信息，所以使得对信息的管理更加及时、高效，提高了工作效率。
论文目录
摘要 1
0 引言 3
1 系统分析 4
1.1 需求分析 4
1.2 可行性分析 4
2 总体设计 4
2.1 项目规划 4
2.2 系统功能结构图 4
3 系统设计 5
3.1 设计目标 5
3.2 开发及运行环境 5
3.3 逻辑结构设计 5
4 网站总体架构 6
4.1 文件布局 6
4.2 网站首页的运行结果 6
4.2 类的分布 8
5 网站后台主要功能模块设计 8
5.1 后台登录模块设计 8
5.2 总管理员设置模块设计 11
5.3 更改总管理员密码模块设计 23
5.4 新闻信息管理 27
5.5 总结 32
6 网站前台主要功能模块设计 32
6.1 今日新闻的显示 32
6.2 输入新闻的关键字查找新闻 34
6.3 新闻人物的查看和投票 36
7 小结 39
附录一 参考文献 40
附录二 数据表 41
附录三 文件架构图 43 -Along with the development of computer science, database technology in Internet is widely used for the user, the network provides circumspect and humanized service. Personalized has gradually become the tidal current Web application. Using the JSP technology development of web news management system, realized the web news dynamic management, because can be used for the dynamic news release information, so that the management of information more timely, efficient, and improve work efficiency.
Paper catalog
In January
0 preface 3
1 system analysis
1.1 demand analysis
1.2 feasibility analysis
2 the overall design
210 project planning
2.2 system function structure of 4
3 system design
3.1 design goal 5
Development and operation environment 3.2
3.3 logic structure design of 5
4 web framework
Document layout 6. 4.1
The operation results 4.2 homepage
The distribution of 4.2
5 website backstage main function module design
Login module design and 5.1 background
5.2 total a Platform: |
Size: 5718016 |
Author:柒尅 |
Hits:
Description: 谢您选择Xweibo产品。
新浪网技术（中国）有限公司(Sina.com Technology (China) Co., Ltd.)为 Xweibo产品的开发商，依法独立拥有 Xweibo产品著作权。Xweibo 产品官方网站网址为http://x.weibo.com。
本授权协议适用且仅适用于Xweibo产品，新浪网技术（中国）有限公司(Sina.com Technology (China) Co., Ltd.)及北京新浪互联信息服务有限公司(Beijing SINA Internet Information Service Co. Ltd.)（以下合称“新浪”）拥有对本授权协议的最终解释权。-Thank you choose Xweibo products. Sina Technology (China) Co., Ltd. (Sina.com Technology (China) Co., Ltd.) Product developer for the Xweibo, independently owned Xweibo products copyright law. Xweibo product website address is http://x.weibo.com. This license agreement applies and only applies to Xweibo products, Sina Technology (China) Co., Ltd. (Sina.com Technology (China) Co., Ltd.) And Beijing SINA Internet Information Services Limited (Beijing SINA Internet Information Service Co. Ltd .) (collectively, the " Sina" ) has the power of final interpretation of the licensing agreement. Platform: |
Size: 4085760 |
Author:张楠 |
Hits:
Description: 自从发布后进者网络公司版本后，许多站长不断咨询使用方法及反映了一些bug，后进者网络在此多谢这些热心的站长，也感谢大侠设计的大力支持，目前更新后进者网络公司新版V4.0,后进者网络主题导入至wordpress主题目录wp-content/themes/下后台更新即可使用。
版本对比:
删除文章详细（single.php）页及普通页面(page.php)边栏重复调用数据，更符合蜘蛛口味。
顶部增加搜索功能，让用户更快查找信息。
更新首页左边栏调用bug（调用规则:标签调用，修改路径/wp-content/themes/houjinzhe/index.php查找关键词后进者网络，修改成需要调用的关键词）
首页增加在线客服显示，修改路径:/wp-content/themes/houjinzhe/index.php 把对应的QQ号码填写成你的QQ号码即可!-Since the release of the version of Internet companies latecomers, many webmasters constantly consulting use and reflect some bug, I would like to thank these enthusiastic webmaster the latecomers network this, also thanks to the strong support of heroes design currently update the network company a new version of the latecomers The V4.0, latecomers network theme Importing to wordpress theme directory wp-content/themes/under updated in the background can be used. The version comparison: delete a post (single.php) page and pages (page.php) sidebar repeated calls to the data, more Spider-taste. Added on top of the search function, allowing users to find information faster. Find Keywords latecomers network update the Home left column call bug (call rules: label call to modify the path/wp-content/themes/houjinzhe/index.php modified keywords need to call) Home increase online customer service, modify the path :/ wp-content/themes/houjinzhe/index.php the corresponding QQ number fill your QQ Platform: |
Size: 3308544 |
Author:yxh |
Hits:
Description: 本系统主要是为了帮助企业解决在日常工作中遇到的客户管理等难题而开发，通过本系统可以对企业事务中的不同功能进行操作，用户通过自定义字段类型可以达到适合不同企业的需求。
产品特点：云架构设计，PC、手机、互联网、局域网皆可使用、操作简单易用。
产品功能：客户资料管理、多条件查询、跟单提醒、合同到期提醒、精确权限设置、数据自定义。
性能稳定：5年行业经验、帮助3万家企业用户实施信息化办公管理，品牌值得信赖。
适用范围：集团企业、中型企业、小型企业、微型企业、创业公司、工作室等。
性价比高：一次购买、终身使用、永久升级、用户不限、数据不限、二次开发。
售后服务：全程专业客服、远程协助、电话指导、邮件往来、QQ协助。-This system is mainly to help enterprises solve encountered in their daily work and the development of customer management and other problems, business affairs can be operated by the different functions of the system, users can achieve a custom field types for different business needs.
Features: cloud architecture, PC, mobile phone, Internet, local area network can be used, simple to use.
Product Features: customer data management, multi-criteria query, with a single reminder, contract expiration reminder, precise permissions, data customization.
Performance and stability: 5 years of industry experience to help 30,000 businesses to implement information office management, brand trusted.
Scope: Group companies, medium-sized and small enterprises, micro-enterprises, start-up companies, studios.
Cost-effective: a purchase, lifetime use, permanent upgrade, users are not limited to, data is not limited, secondary development.
Service: full professional customer service, remote assis Platform: |
Size: 10032128 |
Author:陈红 |
Hits:
Description: SiteTeam企业自助建站软件是一部专业为搜索引擎营销(网站优化/SEO)而设计，操作极简单，网站极稳定、故障自动修复、在线升级维护、建站速度极快、专为大众上网营销而设计的完全免费开源企业建站系统！
1）专为搜索引擎排名而设计。很容易获得较好的搜索引擎排名，也就是说，你通过本网站系统构建起来的企业网站，并用它发布的信息是非常容易获得较好的搜索引擎排名（关于这点，已经有大量的案例）。-SiteTeam enterprise site service software is a professional search engine marketing/SEO (site optimization) and design, the operation is very simple, the site is very stable, automatic fault repair, online upgrade maintenance, fast site, designed for the public Internet marketing and design completely free, open source enterprise station system.
1) designed for search engine rankings. Very easy to get better search engine rankings, that is to say, you through this website system to build up the enterprise website, and using it to publish information is extremely easy to obtain better search engine ranking (about this, there have been a large number of cases). Platform: |
Size: 5022720 |
Author:邰宇 |
Hits:
Description: 智拓分类信息系统是一种基于互联网的分类信息服务平台，主要满足企事业单位和个人在互联网上发布、收集信息的需求。系统安装简便，只需运行install.php文件即可完成安装。 增加了广告位管理功能。-Insight classified information system is an Internet-based free information service platform, mainly to meet the enterprises and individuals posted on the Internet to gather information needs. Installation is simple, just run install.php file to complete the installation. Increased advertising management.
Platform: |
Size: 920576 |
Author:rjl |
Hits:
Description: 智拓分类信息系统是一种基于互联网的分类信息服务平台，主要满足企事业单位和个人在互联网上发布、收集信息的需求。系统安装简便，只需运行install.php文件即可完成安装。 增加了广告位管理功能。-Insight classified information system is an Internet-based free information service platform, mainly to meet the enterprises and individuals posted on the Internet to gather information needs. Installation is simple, just run install.php file to complete the installation. Increased advertising management. Platform: |
Size: 1098752 |
Author:oijq |
Hits:
Search - Internet Information Service 5