How to write an OPC Server

I have recently finished a project about connecting WinCC to and old DCS (TDC3000). In this project I implemented a DDE SERVER. In my new project I should connect a Japanese PLC to WinCC but I don't want to use DDE technology anymore. Does anybody here have idea how I could implement an OPC Server.
Helps would be really appreciated

Any comments ?

try this
www.softwaretoolbox.com
They have a trial OPC server. I tried with SLC 503 and it worked very well.

OPC defines client - server connectivity. There has to be a client (WinCC) for your server (Japanese PLC).

Does WinCC offer an OPC client option? Presumably so.

Then you need an OPC server to handle the Japanese PLC end. If you are not writing/coding an OPC server, then you can buy an OPC server from firms like Kepware or Matrikon for a huge variety of devices, or apparently, softwaretoolbox.

Dan

If you want to roll your own OPC server, this is the place to start.

http://www.opcfoundation.org/

Dear Dan
Actually I'm looking for some advice or sample code or document, help me in coding an OPC server.
thanx