hwnd (HWND)

Window handle of the sender.

pData (PDDEINIT)

Pointer to initiation data.

This points to a DDEINIT structure. pszAppName is the name of the desired server application; if this is a zero-length string, any application can respond. pszTopic is the name of the desired topic; if this is a zero-length string, each responding application responds once for each topic that it can support.

rc (BOOL)

Success indicator.

TRUE

Successful completion
FALSE
Error occurred.

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