获取已打开的所有记事本的标题

unit Unit1;

interface

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

type
  TForm1 = class(TForm)
    Button1: TButton;
    Memo1: TMemo;
    procedure Button1Click(Sender: TObject);
  end;

var
  Form1: TForm1;

implementation

{$R *.dfm}

{获取已打开的所有记事本的标题}
procedure TForm1.Button1Click(Sender: TObject);
var
  h: HWnd;
  p: array[0..254] of char;
begin
  Memo1.Clear;
  h := GetWindow(Handle, GW_HWNDFIRST);
  while h <> 0 do
  begin
    GetClassName(h, p, Length(p));
    if p = 'Notepad' then
    begin
      GetWindowText(h, p, Length(p));
      Memo1.Lines.Add(p);
    end;
    h := GetWindow(h, GW_HWNDNEXT);
  end;
end;

end.

参考笔记:
http://www.cnblogs.com/del/archive/2008/02/25/1081295.html
http://www.cnblogs.com/del/archive/2008/02/28/1085404.html
http://www.cnblogs.com/del/archive/2008/02/28/1085432.html

---