SendMessage() and WM_COPYDATA on VB7 / C# / C++7

Hi All,

I assume it's possible to use SendMessage() WM_COPYDATA API on a WebService to send message/data to a passive Application.

My problem is, I don't know how to receive WM_COPYDATA events on the passive Application. Am using VB7 or C# or C++7
Any suggestions would be of great help !

thanks in advance
rick