Labels:crt screen | dialog box | monitor | plant | sky | tree OCR: Edil Properties . ] 0I CAD Class Name Misc Virtual Text IDi ENu ittri bute Name Cer Expression boo lean bute Tvpe crea te Met hod Name CheckIDNulValue Set E xpression [Set|DNu|Value[isNull] OK Defineltern Cancel Help IDisNull Attribute SetIDNul