1   
2   unit Unit1;
3   
4   interface
5   
6   uses
7     Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
8     Dialogs;
9   
10  type
11    TForm1 = class(TForm)
12    private
13      { Private declarations }
14    public
15      { Public declarations }
16         procedure OnPosChange(var Msg: TWmWindowPosChanging);
17        message WM_WINDOWPOSCHANGING;
18    end;
19  
20  var
21    Form1: TForm1;
22  
23  implementation
24  
25  {$R *.dfm}
26  
27  { TForm1 }
28  
29  procedure TForm1.OnPosChange(var Msg: TWmWindowPosChanging);
30  begin
31    Msg.WindowPos.x := Left;
32    Msg.WindowPos.y := Top;
33    Msg.Result := 0;
34  end;
35  
36  end.
37  
38