In a later article, we will be providing source code and examples of simple RPC client/server and a WCF service/client using the Microsoft Visual Studio environment.
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If you have received this error using dbgrpc -e from windows debugging tools or the platform sdk, please use this program from within an administrators command prompt. For instance, if you have UAC activated, then right click on command prompt and left click on Run As Administrator.
WM_COPYDATA is a window message that you can use as a very simple ipc(Inter Process Communication) mechanism. There are some small issues to overcome when using this with .net, the least of which is the need to use the user32.dll in .net.