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Change taskbar properties (eg. set autohide) in VB.NET

Posted on 2003-10-31
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Last Modified: 2012-08-14
Using vb.net, how can I set properties of the windows taskbar?  
For simplicity sake, I have a form with a single button on it....
I'd like the button to show the taskbar status of autohide, not autohide
As the button clicked, I'd like to toggle the state back and forth.
I can't find what I need in the framework.
thanks
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Question by:jctiii
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6 Comments
 
LVL 48

Expert Comment

by:Mikal613
ID: 9659275
You cant But you can get if it in autohide or the coordiantes with the api SHAppBarMessage .
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LVL 96

Expert Comment

by:Bob Learned
ID: 9660086
With the SHAppBarMessage function, and ABM_GETSTATE and ABM_SETSTATE, you can get/set the state of the AutoHide and AlwaysOnTop properties of the taskbar.
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Author Comment

by:jctiii
ID: 9660429
I've read about  the SHAppBarMessage function...   How do I use this function in vb.net?
 
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LVL 96

Accepted Solution

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Bob Learned earned 1500 total points
ID: 9660540
  Public Structure RECT
      Public Left As Integer
      Public Top As Integer
      Public Right As Integer
      Public Bottom As Integer
   End Structure

   Public Structure APPBARDATA
      Public cbSize As Integer
      Public hwnd As Integer
      Public uCallbackMessage As Integer
      Public uEdge As Integer
      Public rc As RECT
      Public lParam As Integer      'message specific
   End Structure 'APPBARDATA'

   Private Const ABM_GETSTATE As Integer = &H4
   Private Const ABS_ALWAYSONTOP As Integer = &H2

   Private Declare Function SHAppBarMessage Lib "shell32.dll" _
       (ByVal dwMessage As Integer, ByRef pData As APPBARDATA) As Integer

   Private Function AutoHide() As Boolean

      Dim appBar As APPBARDATA
      Dim state As Integer

      appBar.cbSize = Len(appBar)

      state = SHAppBarMessage(ABM_GETSTATE, appBar)

      Return (state <> ABS_ALWAYSONTOP)

   End Function
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Author Comment

by:jctiii
ID: 9670501
Ok... you gave me enough to get the state but not how to set the state.  Nevertheless, you did provide enough for one (even if not 'learned') to figure it out....
Thanks.
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LVL 96

Expert Comment

by:Bob Learned
ID: 9670509
The opposite side is ABM_SETSTATE.
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