delphi取指定进程的全路径串

源代码：
-------------------------------------------------------

unit Unit1;

interface

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

type
  TForm1 = class(TForm)
    Label1: TLabel;
    Edit1: TEdit;
    Label2: TLabel;
    Edit2: TEdit;
    Memo1: TMemo;
    Button1: TButton;
    Button2: TButton;
    procedure Button1Click(Sender: TObject);
    procedure Button2Click(Sender: TObject);
  p rivate
    { P rivate declarations }
  public
    { Public declarations }
  end;

var
  Form1: TForm1;

implementation

{$R *.dfm}
uses PsAPI;

procedure TForm1.Button1Click(Sender: TObject);
begin
  if FindWindow('Notepad',nil)=0 then
    WinExec('notepad.exe',SW_SHOW);
end;

procedure TForm1.Button2Click(Sender: TObject);
var
  hwnd1:HWND;
  h:Cardinal;
  ph1:Cardinal;
  pathName:string;
begin
  hwnd1:=FindWindow(PChar(Edit1.Text),nil); //取窗体句柄
  GetWindowThreadProcessId(hwnd1,@h); //取窗体创建者线程或进程的PID
  ph1:=OpenProcess( PROCESS_ALL_ACCESS,False,h);//由PID取得进程句柄
  SetLength(pathName,MAX_PATH);
  //由进程句柄取得模块全路径
  GetModuleFileNameEx(ph1,0,PChar(pathName),MAX_PATH);
  //GetModuleFileName(0,PChar(pathName),MAX_PATH);
  Memo1.Clear;
  memo1.Lines.Add(pathName);

end;

end.