二次开发画草图用的函数

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ProErrorUserSectionBuild(ProSection section,ProSelection *sketch_refs,int index)
{   ProError status=PRO_TK_NO_ERROR;
    int ent_id;
    ProWSecerror serrors;
/*--------------------------------------------------------------------*\
    调用UsrCreateSection()函数作截面草图
\*--------------------------------------------------------------------*/
    if(!UsrCreateSection(section,index,sketch_refs))
    {
     AfxMessageBox(_T("截面草图错误"));
      return status;
    }
    ProSectionEntityFromProjection(section,sketch_refs[1], &ent_id);
    status=ProSectionEntityFromProjection(section,sketch_refs[2], &ent_id);
/*--------------------------------------------------------------------*\
    自动标注截面
\*--------------------------------------------------------------------*/
    ProSecerrorAlloc(&serrors);
    status=ProSectionAutodim(section,&serrors);
    ProSecerrorFree(&serrors);
    returnstatus ;
}
ProErrorUserSectionBuild1(ProSection section,ProSelection *sketch_refs,int index)
{   ProError status=PRO_TK_NO_ERROR;
    int ent_id;
    ProWSecerror serrors;
/*--------------------------------------------------------------------*\
    调用UsrCreateSection()函数作截面草图
\*--------------------------------------------------------------------*/
    if(!UsrCreateSection(section,index,sketch_refs))
    {
     AfxMessageBox(_T("截面草图错误"));
      return status;
    }
    ProSectionEntityFromProjection(section,sketch_refs[1], &ent_id);
    status=ProSectionEntityFromProjection(section,sketch_refs[2], &ent_id);
/*--------------------------------------------------------------------*\
    自动标注截面
\*--------------------------------------------------------------------*/
    ProSecerrorAlloc(&serrors);
    status=ProSectionAutodim(section,&serrors);
    ProSectionRegenerate(section, &serrors);
    ProSecerrorFree(&serrors);
    returnstatus ;
}

这是在一个完整程序里面取出的一段关于画草图的，这两个几乎一模一样的函数有什么作用？那个不一样的语句是什么意思？有什么作用？