unit1.pas

罗小平<<delphi精要>>一书源码

unit Unit1;

interface

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

type
  TForm1 = class(TForm)
    Button1: TButton;
    procedure Button1Click(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form1: TForm1;

implementation

{$R *.dfm}

function GetAllRunningWindows: TStrings;
  function EnumWindowsCode(Wnd: hWnd; Strs: TStrings): Boolean; stdcall;
  var
    Buffer: Array[0..MAXBYTE-1] of Char;
  begin
    if GetWindowText(Wnd, Buffer, MAXBYTE) <> 0 then
      Strs.Add(StrPas(Buffer));
    Result := True;
  end;
begin
  Result := TStringList.Create;
  EnumWindows(@EnumWindowsCode, LongInt(Result));
end;

procedure TForm1.Button1Click(Sender: TObject);
begin
  with GetAllRunningWindows do
  begin
    ShowMessage(Text);
    Free;
  end;
end;

end.