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Posted 9 Dec 2010
Licenced CPOL

Hiding the form from alt-tab menu

, 19 Dec 2010
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Hiding the form from alt-tab menu
This is a UI tweak for hiding the form from alt-tab menu.

protected override CreateParams CreateParams
      CreateParams cp = base.CreateParams;
      cp.ExStyle |= 0x80;
      return cp;

In order to make it work, you have to use Me.ShowInTaskbar = False


WS_EX_TOOLWINDOW bit is turned on by OR-ing ExStyle with 0x80.

The following always works,
Me.FormBorderStyle = FormBorderStyle.SizableToolWindow;
Me.ShowInTaskbar = False;

But if you have a borderless form, i.e., FormBorderStyle.None then ShowInTaskbar = False doesn't work. So, we should set the WS_EX_TOOLWINDOW to true in addition to Me.ShowInTaskbar = False.


This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)


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is a poor software developer and thinker. Presently working on a theory of "complementary perception". It's a work in progress.

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GeneralReason for my vote of 1 My vote of 1, to post the code that ... Pin
Prerak Patel9-Dec-10 22:23
professionalPrerak Patel9-Dec-10 22:23 
GeneralYou might mention, in a short sentence, why that works and w... Pin
Walt Fair, Jr.9-Dec-10 14:50
professionalWalt Fair, Jr.9-Dec-10 14:50 

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