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Does the taskbar automatically hide?


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To determine the size of the available screen estate in Delphi 3 or earlier, you need to know whether the taskbar is visible or not.
Here's a simple function to check for this:

//  Returns TRUE if taskbar auto hide is on.
//  if IsTaskBarautoHideOn then
//  begin
//    .. auto hide is ON ..
//  end;
function IsTaskbarAutoHideOn : Boolean;
  ABData : TAppBarData; 
  ABData.cbSize := SizeOf (ABData); 
  result := (SHAppBarMessage (ABM_GETSTATE, ABData) and ABS_AUTOHIDE) > 0 

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