执行控制台程序并且获得它的输出结果

前几日遇到的问题在各位的帮助下已经圆满解决，现在吧这段代码写出来，可能会有一点用处。
procedure CheckResult(b: Boolean);
begin
  if not b then
    Raise Exception.Create(SysErrorMessage(GetLastError));
end;

function RunDOS(const Prog, CommandLine,Dir: String;var ExitCode:DWORD): String;
var
  HRead,HWrite:THandle;
  StartInfo:TStartupInfo;
  ProceInfo:TProcessInformation;
  b:Boolean;
  sa:TSecurityAttributes;
  inS:THandleStream;
  sRet:TStrings;
begin
  Result := ;
  FillChar(sa,sizeof(sa),0);
  //设置允许继承，否则在NT和2000下无法取得输出结果
  sa.nLength := sizeof(sa);
  sa.bInheritHandle := True;
  sa.lpSecurityDescriptor := nil;
  b := CreatePipe(HRead,HWrite,@sa,0);
  CheckResult(b);

  FillChar(StartInfo,SizeOf(StartInfo),0);
  StartInfo.cb := SizeOf(StartInfo);
  StartInfo.wShowWindow := SW_HIDE;
  //使用指定的句柄作为标准输入输出的文件句柄,使用指定的显示方式
  StartInfo.dwFlags    := STARTF_USESTDHANDLES+STARTF_USESHOWWINDOW;
  StartInfo.hStdError  := HWrite;
  StartInfo.hStdInput  := GetStdHandle(STD_INPUT_HANDLE);//HRead;
  StartInfo.hStdOutput  := HWrite;

  b := CreateProcess(PChar(Prog),//lpApplicationName: PChar     
        PChar(CommandLine),    //lpCommandLine: PChar
        nil,    //lpProcessAttributes: PSecurityAttributes
        nil,    //lpThreadAttributes: PSecurityAttributes
        True,    //bInheritHandles: BOOL
        CREATE_NEW_CONSOLE,
        nil,       
        PChar(Dir),
        StartInfo,
        ProceInfo    );

  CheckResult(b);
  WaitForSingleObject(ProceInfo.hProcess,INFINITE);
  GetExitCodeProcess(ProceInfo.hProcess,ExitCode);

  inS := THandleStream.Create(HRead);
  if inS.Size>0 then
  begin
    sRet := TStringList.Create;
    sRet.LoadFromStream(inS);
    Result := sRet.Text;
    sRet.Free;
  end;
  inS.Free;

  CloseHandle(HRead);
  CloseHandle(HWrite);
end;