不可移动的窗体

procedure windowsposchange(var Msg:TWMWINDOWPOSCHANGING);message WM_WINDOWPOSCHANGING;

var
Form13: TForm13;
//
oleft:integer;
otop:integer;
owidth:integer;
oHeight:integer;

implementation

{$R *.dfm}

procedure TForm13.FormCreate(Sender: TObject);
begin
oleft:=Left;
otop:=Top;
owidth:=Width;
oheight:=Height;
end;

procedure TForm13.windowsposchange(var Msg:TWMWINDOWPOSCHANGING);
begin
Msg.WindowPos.x:=oleft;
Msg.windowpos.y:=otop;
Msg.windowpos.cx:=owidth;
Msg.windowpos.cy:=oheight;
inherited;
end;