Delphi - Maximize a form to a particular screen

Question

Quite a simple one i would think, but i need to be able to Maximize a form to a particular screen. Cant seem to find any Delphi specific info.

I can remember the forms position over subsequent application loads. However, when i restore the position, then call WindowState := wsMaximized, the form moves to the other screen! (i do have other forms also visible on that screen - it appears its maximizing to the 'active screen')

So i need a function like so:

procedure Maximize(const aScreenIndex : Integer);
begin
 if aScreenIndex < Screen.MonitorCount then
   //Maximize to that screen
end;

Remy Lebeau · Accepted Answer · 2011-06-16 07:22:18Z

5

Intercept the WM_GETMINMAXINFO message and adjust the coordinates inside its MINMAXINFO structure as needed.

answered Jun 16, 2011 at 7:22

Remy Lebeau

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Despatcher · Accepted Answer · 2011-06-16 09:05:24Z

2

Set Form.Position to poDesigned at design time In Form.FormShow or your Maximize procedure:

procedure Maximize(const aScreenIndex : Integer);
begin
  if aScreenIndex < Screen.MonitorCount then
  begin 
   //Maximize to that screen
    Myform.Left := screen.Monitors[aScreenIndex ].Left;
    Myform.WindowState := wsMaximized;
  end; 
end;

answered Jun 16, 2011 at 9:05

Despatcher

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1 Comment

user30478 Over a year ago

Genius! This solves the how to position a form in a additional monitor problem although in a maximized form. The problem had something to do with hide/show and this solved it as I put the medicine in onShow of the form.

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