Delphi wrote a quite good OPC DA Server procedures, the development of OPC Server as a good reference. OPC is OLE in the field of industrial applications, the same between different configuration software and configuration software applications and communications between the standard configuration prior to application software and communications between the main technology is the application of DDE.

Packet : 47538delphiopcserver服务器opc.zip filelist
AsyncUnit.pas
comcat.pas
EnumItemAtt.pas
Enumstring.pas
EnumUnknown.pas
FirstServ.dof
FirstServ.dpr
FirstServ.drc
FirstServ.res
FirstServ.tlb
Globals.pas
GroupUnit.pas
IOPCBrowseServerAddressSpaceIMPL.pas
IOPCCommonIMPL.pas
IOPCServerIMPL.pas
IOPCServerPublicGroupsIMPL.pas
IPersistFileIMPL.pas
ItemAttributesOPC.pas
ItemPropIMPL.pas
ItemsUnit.pas
Main.dfm
Main.pas
MRD_TLB.pas
MRD_TLB.tlb
OPCErrorStrings.pas
readme-server.txt
readme.txt
RegDeRegServer.pas
ServIMPL.pas
ShutDownRequest.dfm
ShutDownRequest.pas

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