From: anorland AT hem2 DOT passagen DOT se (Anders Norlander)
Subject: Re: Subclassing and a couple of other things
12 Aug 1998 05:21:07 -0700
Message-ID: <35D13531.CDEDFC84.cygnus.gnu-win32@hem2.passagen.se>
References: <003001bdc4fe$1df6e920$bbaeb6c2 AT kk5002 DOT kkhs DOT dk>
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To: Simon Vilmer Pedersen <0507svp AT post DOT kkhs DOT dk>
Cc: gnu-win32 AT cygnus DOT com

Simon Vilmer Pedersen wrote:
> 
> Hi all.
> 
> I am experimenting a bit with window subclassing, in specific subclassing the window of the IRC program mIRC from another program. But I cannot seem to get it to work like in the SDK.
> First I get the hwnd of the window, with FindWindow("mIRC",NULL)
> and it returns the proper hwnd.
> But when I then call orgWinProc = (WNDPROC)SetWindowLong(hwnd,GWL_WINPROC,(LONG)WinProc)
> it returns NULL, and a test with GetWindowLong shows that the above command had no effect.
> But GetLastError returns 0. Anyone who can help me with this?

You cannot subclass a window in another process in WIN32.
This is because the processes have different address
spaces.

/Anders
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