Private Sub Form_BeforeUpdate(Cancel As Integer)
If Nz(Me.Trans_Weight, 0) = 0 Then
MsgBox "Weight in Pounds cannot be empty. Please enter a valid value.", vbCritical
Me.Trans_Weight.SetFocus
Cancel = True
ElseIf Nz(Me.Trans_PricePerPound, 0) = 0 Then
MsgBox "Price per Pound cannot be empty. Please enter a valid value.", vbCritical
Me.Trans_PricePerPound.SetFocus
Cancel = True
End If
End Sub