关于怎样删除一个DWG文件

errBoy

void OpenDoc( void *pData);

int COpDwg_OpenOtherDwg(CString strNewFileName)
{
 SErrorInfo     errInfo;
 struct resbuf    resSysVal;
 bool      bTmp;
 AcApDocument*    pDoc;     

 try
 {
  //Early work
  errInfo.strCallFuncName = "COpDwg_OpenOtherDwg";
 
  strNewFileName.TrimLeft();
  strNewFileName.TrimRight();
  //システム変数初期设定(SDI)
        CSysDa_InitThisVal("SDI",false,resSysVal);
  //一时的にMDIモードに设定する(SDIモードだとファイルをオープンする际に例外発生)
  CSysDa_SetSysValue(0, true, bTmp);

  pDoc = acDocManager->curDocument();
     acDocManager->activateDocument(pDoc, Adesk::kTrue); 
  if(bSave == true)
  {
   acDocManager->sendStringToExecute( pDoc, "(vl-load-com)(vl-cmdf \"vbastmt\" (strcat \"ThisDrawing.Close True\"))\n",
                                                         false, true);

  }
  else
  {
   acDocManager->sendStringToExecute( pDoc, "(vl-load-com)(vl-cmdf \"vbastmt\" (strcat \"ThisDrawing.Close False\"))\n",
                                                         false, true);

  }
  pDoc = NULL;
  pDoc = acDocManager->curDocument();
     acDocManager->activateDocument(pDoc, Adesk::kTrue); 
  acDocManager->executeInApplicationContext(OpenDoc, (void *)(LPSTR)(LPCTSTR)strNewFileName);
  return RTN_TRUE;
 }
 catch(...)
 {
  errInfo.strErrMsg = ERR_MSG_EXCEPTION;
  goto SystemError;
 }

SystemError:
 CError_WriteErrlog(errInfo);
 return RTN_SYSERR; 
}

void OpenDoc( void *pData)
{
 AcApDocument* pDoc = acDocManager->curDocument();

 if (acDocManager->isApplicationContext())
 {
  acDocManager->appContextOpenDocument((const char *)pData);
 }
 else
 {
  acutPrintf("\nERROR To Open Doc!\n");
 }
}

憋了这么多天终于有了点眉目,这段代码想要实现的功能是:将当前活动文件删除,并以strNewFileName路径名打开一个文件.现在在执行了sendStringToExecute后,再执行executeInApplicationContext,就会出现异常,我很不理解,还请哪位高手多多指点一下呀