Delphi 调用外部程序并阻塞到外部程序中

unit uMain;
interface
uses
 Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
 Dialogs, RzButton, StdCtrls;
type
 TFrmMain = class(TForm)
  mmMsg: TMemo;
  btnExecute: TRzBitBtn;
  btnClear: TRzBitBtn;
  procedure MsgDsp(v_Str: string);
  procedure btnExecuteClick(Sender: TObject);
  procedure btnClearClick(Sender: TObject);
 private
  { Private declarations }
 public
  { Public declarations }
 end;
var
 FrmMain: TFrmMain;
implementation
{$R *.dfm}
procedure TFrmMain.MsgDsp(v_Str: string);
begin
 mmMsg.Lines.Add('[ admin ] - [' + v_Str + '] - [' + FormatDateTime('YYYY-MM-DD hh:mm:ss zzz', Now()) + ']');
end;
procedure TFrmMain.btnExecuteClick(Sender: TObject);
var
 sInfo: TStartupInfo;
 pInfo: TProcessInformation;
 cmdLine: string;
 exitCode: Cardinal;
begin
 MsgDsp('初始化参数');
 cmdLine := 'C:\Program Files\7-Zip\7zFM.exe';
 FillChar(sInfo, sizeof(sInfo), #0);
 sInfo.cb := SizeOf(sInfo);
 sInfo.dwFlags := STARTF_USESHOWWINDOW;
 sInfo.wShowWindow := SW_NORMAL;
 MsgDsp('参数初始化完成，启动WinExec调试');
 //CreateProcess用来启动进程, 进程启动后, 会填写TProcessInformation这个结构，
 //此时程序阻塞到该句柄中，等待句柄的进程结束或超时
 if not CreateProcess(nil, pchar(cmdLine), nil, nil, false, CREATE_NEW_CONSOLE or NORMAL_PRIORITY_CLASS, nil, nil, sInfo, pInfo) then
 begin
  MsgDsp('WinExec调试失败！');
  MessageBox(Application.handle, '指定程序启动失败!', '错误', MB_OK or MB_ICONSTOP);
 end
 else
 begin
  //等待指定句柄的进程结束或超时
  WaitForSingleObject(pInfo.hProcess, INFINITE);
  GetExitCodeProcess(pInfo.hProcess, exitCode);
  MsgDsp('WinExec调试成功！');
 end;
end;
procedure TFrmMain.btnClearClick(Sender: TObject);
begin
  mmMsg.Clear;
end;
end.