窗口移动事件

unit Unit1;

interface

uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs;

type
  TForm1 = class(TForm)
  private
    { Private declarations }
    procedure WMEnterSizeMove(var Message: TMessage) ; message WM_ENTERSIZEMOVE;
    procedure WMMove(var Message: TMessage) ; message WM_MOVE;
    procedure WMExitSizeMove(var Message: TMessage) ; message WM_EXITSIZEMOVE;
  public
    { Public declarations }
  end;

var
  Form1: TForm1;

implementation

{$R *.dfm}

procedure TForm1.WMEnterSizeMove(var Message: TMessage) ;
begin
  Caption:= '正在移动';
end;

procedure TForm1.WMMove(var Message: TMessage) ;
begin
  Caption:= Format('移动到 x: %d, y:%d', [TWMMove(Message).XPos,TWMMove(Message).YPos]) ;
end;

procedure TForm1.WMExitSizeMove(var Message: TMessage) ;
begin
  Caption:= Caption + '  移动结束'
end;

end.