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DDE and SQL server
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Source：Internet Author：Unknow Pubdate：2008-04-14
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ELEphilippe (Electrical)
7 May 03 17:30
I have to start learning DDE because I have to get a PLC to communicate with SQL server (trough the serial port or an Ethernet card) and I would like to know if anybody has documention to suggest or anything that would help to get familiar with DDE.
Thank you
Benkku (Computer)
9 May 03 8:54
I don't see where you need DDE conversation.
Afterall communication with PLC is done via RS-232 port. So you need to use MSCOMM.OCX ActiveX component or use Win32 API directly.
As for database access, you could use for example ActiveX Data Objects a.ka ADO library.
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