🚀 go-pugleaf

Before I ask my next question I would like to thank two people who have 
helped me before: Stephen Groundwater for drag & drop server information, 
and Brett Manz for revealing the stm_SetIcon message to me. Thank you.

And now, could anyone tell me the correct method of calling the procedure 
address returned by GetWindowLong(hWnd, gwl_WndProc)?

I want to intercept one message from another application, so I get the 
address of the window function with OldWndProc:=GetWindowLong(hWnd, 
gwl_WndProc), and substitute a new window function with 
SetWindowLong(hWnd, gwl_WndProc, longint(@MyNewProc)), and my new function 
gets all the window messages, which is what I want. But when I try to pass 
the messages I don't want to intercept on to the OldWndProc, I get a 
general protection fault. How do I pass the unwanted messages on to the 
other application?

As you can tell, I am using Turbo Pascal for Windows, but a C example 
(perhaps with some commenting) I should be able to understand.

Thanks to anyone who responds,
                                        chris.snell@canrem.com

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