COPYDATASTRUCT Structure & WM_COPYDATA

Hi

I've been playing with the system commands and can’t figure out how to create this structure. I need to send string data to another process.

The definition for COPYDATASTRUCT

typedef struct tagCOPYDATASTRUCT {
ULONG_PTR dwData;
DWORD cbData;
PVOID lpData;
} COPYDATASTRUCT, *PCOPYDATASTRUCT;

Can anyone help?

Thanks
dahood