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Article View: borland.public.cppbuilder.nativeapi
Article #129

Re: Problem with global hook?

#129
From: Bob Gonder
Date: Thu, 12 Jun 2008 15:17
44 lines
2429 bytes
Patryk B. wrote:

>Ok, code work like it should, inactive windows are transparent, active
>window not. But when im traying to move window it's move veeeery slow.
>It's laging and I dont know why...
>When I put for example Beep() instead of setting transparency, pc beeping
>when window changing state but it not laging.

The following code is all that is executed during drag,
so that shouldn't be the problem:

>LRESULT CALLBACK CallWndProc(int nCode, WPARAM wParam, LPARAM lParam)
>{
>	if(nCode <0)
>	{	return CallNextHookEx(hWin, nCode, wParam, lParam);
>	}
>	if(nCode==HC_ACTION)
>	{	CWPSTRUCT* msg=(CWPSTRUCT*)lParam;
>		hWindow=msg->hwnd;	<-- not significant,
			but you might move this after if(WM_ACTIVATE)
>		if(msg->message==WM_ACTIVATE)
>		{
			// not executed during drag.
>		}
>	}
>	return CallNextHookEx(hWin, nCode, wParam, lParam);
>}

>When I set transparency for window from normal program (exe) it
>works ok. So why it dont work when im trying to set transparency
>from that dll?

When setting from program, only program is affected.
When setting from DLL, _all_ windows affected.

Just a guess, but from the following link, you should be clearing
the WS_EX_LAYERED bit instead of changing the alpha to 255.

Using Layered Windows (bottom of page)
http://msdn.microsoft.com/en-us/library/ms632598(VS.85).aspx

See also Layered Windows at
http://msdn.microsoft.com/en-us/library/ms632599(VS.85).aspx
where it suggests using UpdateLayeredWindow for position changes.
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From: Bob Gonder <none@nowhere.invalid>
Newsgroups: borland.public.cppbuilder.nativeapi
Subject: Re: Problem with global hook?
Date: Thu, 12 Jun 2008 08:17:08 -0700
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