// 判断是否存在名称为“LAY”的图层
AcDbLayerTable *pLayerTbl;
//获取当前图形层表
acdbHostApplicationServices()->workingDatabase()->getLayerTable(pLayerTbl, AcDb::kForWrite);
if (pLayerTbl->has(_T("LAY")))
{
pLayerTbl->close();
return;
}
acutPrintf(_T("\n当前图形中未包含\"LAY\"图层!"));
AcDbLayerTableRecord *pLayerTblRcd = new AcDbLayerTableRecord();
pLayerTblRcd->