How to use SetWindowsHookEx?

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#499

From: amol
Date: Wed, 19 Mar 2008 05:36

25 lines
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Hi there,

I am getting following error messages while using SetWindowsHookEx:

"cannot convert 'long (__stdcall *)(int,unsigned int,long)' 
to 'int(__stdcall *)()' "

"Type mismatch in parameter 'lpfn' (wanted 'int(__stdcall *)()', got 'long(__stdcall *) (int,unsigned int,long)')"


I am calling the "SetWindowsHookEx" as follow:

hook = SetWindowsHookEx(WH_KEYBOARD,KeyboardProc,hinstance,NULL);
LRESULT CALLBACK KeyboardProc(int ncode,WPARAM wparam,LPARAM lparam)
{
  return ( CallNextHookEx(hook,ncode,wparam,lparam) );
}

As per the documentation "KeyboardProc" should take three parameters, but it is giving me error.
I am using C++ Builder 6.

Thanks,

Amol

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