Passing and receiving user types in Windows messaging

[gageller]

Hi All,

I am having a problem passing user-defined types in a windows message. When I send the message, it is coming across as Nothing.

I have defined the Windows procedure to take a lParmam as Any. When I process a standard Windows message by passing it to CallWindowsProc , it blows up.

I am not sure what I am doing wrong. I have tried doing this before.

Thanks for any help in advance.

Greg