//声明: GetFocus: HWND; {无参数; 返回当前拥有焦点窗口的句柄}
//举例: unit Unit1; interface uses Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms, Dialogs, StdCtrls, ExtCtrls; type TForm1 = class(TForm) Button1: TButton; Memo1: TMemo; Edit1: TEdit; Timer1: TTimer; procedure Timer1Timer(Sender: TObject); end; var Form1: TForm1; implementation {$R *.dfm} procedure TForm1.Timer1Timer(Sender: TObject); var h: HWND; begin h := GetFocus; Text := IntToStr(h); end; end.
//效果图: