[DUG] SetWindowPos HWND_TOPMOST

[Maurice Butler]

even office 10 has this problem on win7 so it is an inheint windows problem
:( Maurice

-----Original Message-----
From: delphi-bounces at delphi.org.nz [mailto:delphi-bounces at delphi.org.nz] On
Behalf Of Jeremy Coulter
Sent: Tuesday, 24 August 2010 10:51 a.m.
To: NZ Borland Developers Group - Delphi List
Subject: Re: [DUG] SetWindowPos HWND_TOPMOST


or....write your own dialogs :-)

jeremy


On Tue, Aug 24, 2010 at 10:32 AM, John Bird <johnkbird at paradise.net.nz>
wrote:


Not just Delphi - its an ancient Windows problem AFAIK.   Even in Windows 7
I have seen a control panel applets puts a modal dialog behind the window -
often the best solution is Windows+D  (show desktop) and go thru all windows
with alt+Tab and usually the hidden modal dialog is found.   Usually.
 
John

 

HI have seen this even happen in D2007 ! so I am not sure if it has been
sorted in later Delphi versions. I have seen other Windows apps. Not written
in Delphi Exhibit the same thing, so is it a Delphi thing, or a Windows
thing?? P.s this happens on XP, Vista and Win7 that I have noticed.

 

Jeremy

 

From: delphi-bounces at delphi.org.nz [mailto:delphi-bounces at delphi.org.nz] On
Behalf Of Ross Levis
Sent: Friday, 20 August 2010 22:04
To: 'NZ Borland Developers Group - Delphi List'
Subject: [DUG] SetWindowPos HWND_TOPMOST

 

I have a window in my app which needs to be set to stay on top of all
others.  In D7, if a modal dialog is activated from this window such as a
TOpenFile, it appears underneath the window.  I believe later versions of
Delphi resolve this problem.

 

I got around the issue by using SetWindowPos with HWND_NOTOPMOST just before
the dialog is activated, and set it back again afterwards.

 

This works well generally, but a few users have complained of the entire app
hanging either before the dialog appears or after it closes.  I've noticed
this maybe twice over the last few years using XP.

 

Is this an XP bug or Delphi getting confused?

 

Perhaps I should try a Application.ProcessMessages after the SetWindowsPos.

 

Ross.



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