تغییر سایز و مکان پنجره ی فعال

function ChangeSize(Handle: Hwnd; dHeight, dWidth: Integer; ScreenCenter: Boolean): Boolean;
var
P: TRect;
begin
Result := False;
try
GetWindowRect(Handle, P); {Der TRect var die Positions daten des Fenster übergeben}
if ScreenCenter then
MoveWindow(Handle, (Screen.Width-dWidth) div 2, (Screen.Height-dHeight) div 2, dHeight, dWidth, True)
else
MoveWindow(Handle, P.Left, P.Top, dHeight, dWidth, True);
except
Result := False;
end;
Result := True;
end;

author :Henning Huncke