怎样对查找数据结果值进行判断？空值时 if语句该怎么写？
objRet8 = Excel.Find(objExcelWorkBook,"Sheet1","A1:A"&h,sRet1,False,False)
TracePrint(sRet1)
If objRet8=Null
Excel.DeleteRow(objExcelWorkBook,"Sheet1","A"&n,True)
TracePrint(objRet8)
Return retValue
End If
