automatic upgrade service VC source code, would like to upgrade the software so a friend reference, it is worth studying.

AboutDlg.cpp
AboutDlg.h
ActionPoints.cpp
ActionPoints.h
Actions.h
AuthenticationDlg.cpp
AuthenticationDlg.h
BackUp.cpp
BackUp.h
CheckForUpdatesProcess.cpp
CheckForUpdatesProcess.h
CheckVersion.cpp
CheckVersion.h
CloseApplicationDlg.cpp
CloseApplicationDlg.h
ConfirmationDlg.cpp
ConfirmationDlg.h
ConnectionTest.cpp
ConnectionTest.h
Constants.h
CopyFile.cpp
CopyFile.h
CopyFolder.cpp
CopyFolder.h
CustomBitmapButton.cpp
CustomBitmapButton.h
Download.cpp
Download.h
EditLicense.cpp
EditLicense.h
ErrorDlg.cpp
ErrorDlg.h
EventActions.h
EventData.cpp
EventData.h
EventInfo.cpp
EventInfo.h
exe
...\upx.exe
FileData.cpp
FileData.h
FileVersion.cpp
FileVersion.h
FtpFileObject.cpp
FtpFileObject.h
Functions.cpp
Functions.h
GarbageCollector.cpp
GarbageCollector.h
GetOpt.cpp
GetOpt.h
HttpFileObject.cpp
HttpFileObject.h
HyperlinkLabel.cpp
HyperlinkLabel.h
InformationDlg.cpp
InformationDlg.h
IniData.cpp
IniData.h
Install.cpp
Install.h
InstallFiles.cpp
InstallFiles.h
InstallIni.cpp
InstallIni.h
InstallRegistry.cpp
InstallRegistry.h
InternalData.cpp
InternalData.h
Internet.cpp
Internet.h
Language.cpp
Language.h
Log.cpp
Log.h
LogViewerDlg.cpp
LogViewerDlg.h
Markup.cpp
Markup.h
md5.cpp
md5.h
ModeFullPropCheck.cpp
ModeFullPropCheck.h
ModeFullPropDownload.cpp
ModeFullPropDownload.h
ModeFullPropFinish.cpp
ModeFullPropFinish.h
ModeFullPropHtmlMessage.cpp
ModeFullPropHtmlMessage.h
ModeFullPropInstall.cpp
ModeFullPropInstall.h
ModeFullPropLicense.cpp
ModeFullPropLicense.h
ModeFullPropProtection.cpp
ModeFullPropProtection.h
ModeFullPropRollback.cpp
ModeFullPropRollback.h
ModeFullPropSelectUpdate.cpp
ModeFullPropSelectUpdate.h
ModeFullPropWelcome.cpp

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