WinAPI: GetFocus - 获取当前拥有焦点的窗口的句柄

//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:

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