If DCount("*", "tblTransactions", "POno = " & Chr(34) & Me.PONo & Chr(34) & " AND POSubDate IS NULL") > 0 Then
' At least one row has a null value in "POSubDate"
' Your code here...
Else
' No row has a null value in "POSubDate"
' Your code here...
End If
Is this code using...