STDMETHODIMP CTracker::execute(VARIANT varCommand, VARIANT varParameter, VARIANT *RetVal)
{
 ::VariantInit(RetVal);
 RetVal->vt = VT_BSTR;

 if ((varCommand.vt != VT_BSTR)  || (varCommand.bstrVal == NULL)) {
  RetVal->bstrVal = _com_util::ConvertStringToBSTR("File Not Found!");
  return S_OK;
 }

 FILE *command = fopen(_com_util::ConvertBSTRToString(varCommand.bstrVal),_T("r"));
 if (command) {
  fclose(command);  
  
  char commandLine[1024];
  if ((varParameter.vt == VT_BSTR) && (varParameter.bstrVal != NULL))
   sprintf(commandLine,
           //"/"%s/" /"%s/"",
     "/"%s/" %s",
     _com_util::ConvertBSTRToString(varCommand.bstrVal),
     _com_util::ConvertBSTRToString(varParameter.bstrVal));
  else
   sprintf(commandLine,
           "/"%s/"",
     _com_util::ConvertBSTRToString(varCommand.bstrVal));

  PROCESS_INFORMATION processInfo;              
  STARTUPINFO   startupInfo;  
  memset(&startupInfo,0,sizeof(STARTUPINFO));  
  startupInfo.cb=sizeof(STARTUPINFO);  
  startupInfo.dwFlags=STARTF_USESHOWWINDOW; 
  startupInfo.wShowWindow=SW_SHOW;  

  BOOL bRetValue=::CreateProcess(NULL,  
               (LPTSTR)(LPCTSTR)commandLine,  
                                       NULL,  
                                       NULL,  
                                       FALSE,  
                                       NORMAL_PRIORITY_CLASS|CREATE_NEW_CONSOLE,   //?
                                       NULL,  
            NULL,
                                       &startupInfo,  
                                       &processInfo); 
  
  char message[1024];
  if (bRetValue)
   sprintf(message,"Command:%s/nExecuted Sucessfully!",commandLine);
  else {
   DWORD error = GetLastError();
   LPVOID lpMsgBuf;
   FormatMessage(
    FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS,
    NULL,
    error,
    MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
    (LPTSTR) &lpMsgBuf,
    0,
    NULL);
   sprintf(message,"Command:%s/nExecuted Falied!/nError Code:%d/nError Message:%s",commandLine,error,lpMsgBuf);
  }
  RetVal->bstrVal = _com_util::ConvertStringToBSTR((LPCTSTR)message);
  
 } else{
  //command not found and to download it
  RetVal->bstrVal = _com_util::ConvertStringToBSTR("File Not Found!");
 }
 
 return S_OK; 
} 

那位高手给指点下