不可移动的窗口示例代码

      unit Unit1;
            interface
            uses

              Windows  Messages  SysUtils  Classes  Graphics  Controls  Forms 
            Dialogs
              StdCtrls;
            type
              TForm1 = class(TForm)
                Label1: TLabel;
                Label2: TLabel;
                Label3: TLabel;
                Label4: TLabel;
                Label5: TLabel;
                procedure FormCreate(Sender: TObject);
              private
                { Private declarations }
                OldLeft OldTop OldWidth OldHeight: Integer;
              public
                { Public declarations }
              protected
                procedure WMMOVING(var msg: TMessage);message WM_MOVING;
              end;
            var
              Form1: TForm1;
            implementation
            {$R *.DFM}
            procedure TForm1.WMMOVING(var msg: TMessage);
            var
              rect: ^TRect;
            begin
              label1.Caption := IntToStr(msg.WParam);
              rect := Pointer(msg.LParam);
              Label2.Caption := IntToStr(rect.Left);
              Label3.Caption := IntToStr(rect.Top);
              Label4.Caption := IntToStr(rect.Right);
              Label5.Caption := IntToStr(rect.Bottom);
              rect.Left := OldLeft;
              rect.Top := OldTop;
              rect.Right := rect.Left + OldWidth;
              rect.Bottom := rect.Top + OldHeight;
             
              msg.Result := 0;
            end;
            procedure TForm1.FormCreate(Sender: TObject);
            begin
              OldLeft := Left;
              OldTop := Top;
              OldWidth := Width;
              OldHeight := Height;
            end;
            end.,