Occurs if a value is to be verified.
Event ValidateValue(intCol As Integer, fOk As Boolean)
atb_ValidateValue(intCol, fOk)
To verify a value, use atb.Columns(intCol).Value, because the event may be called for a column other than the current one.
Example
Private Sub atb1_ValidateValue(ByVal intCol As Integer, fOk As Boolean)
If intCol = 3 Then
fOk = (atb1.Value(intCol) < 100)
End If
End Sub