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double askFaceArea(tag_t objTag)
{
  string libgeom= GetUGInstallPath() + "libgeom.dll";
  char library_name[256] = { '\0' };
  strcpy(library_name, libgeom.c_str());
  typedef double(*load_ufusr_f_p_t)(unsigned int v1, double v2);//定义传参
  load_ufusr_f_p_t MEASURE_ask_face_area = NULL;
  UF_load_library(library_name, "?MEASURE_ask_face_area@@YANIN@Z",(UF_load_f_p_t *)&MEASURE_ask_face_area);
  if (MEASURE_ask_face_area != NULL)
    return MEASURE_ask_face_area(objTag, 0.001);
  else
    return 0;
}