샘플 코드 int ArxGetEntUnderPos(AcDbObjectIdArray& ids , const AcGePoint3d& pt) { ads_point ptUnder = {pt.x, pt.y, pt.z}; ads_name ss; int res; if (RTNORM != (res = acedSSGet(":E", ptUnder, NULL, NULL, ss))) { // There is probably nothing under the cursor, // so return and let AutoCAD process the message return RTFAIL; } long length = 0L; acedSSLength(ss, &length); if (0 == length) { // There is nothing under the cursor, // so there is no need to show the context menu. // Let AutoCAD process the message. acedSSFree(ss); return RTFAIL; } ads_name ename; for(int i = 0;i < length;i++) { acedSSName(ss, i, ename); AcDbObjectId entId; if(Acad::eOk != acdbGetObjectId(entId, ename)) continue; ids.append(entId); } acedSSFree(ss); return RTNORM; }