Field Values conditioned on Yes/No Box

[wasseypurian]

I have trying to validate the entry in another field say 'Amount' after user enters the value(Yes/No using check box) in the field 'Checkout'.

How to make sure that I prompt user to enter a non zero amount in the 'Amount' field value if he enters 'Yes' in 'Checkout' field and leave it zero if chooses 'No'.

[JenZzz]

Could you be a bit more specific.
If you simply want to check the value in your textbox and if it's empty, prompt the user to either enter or leave it 0 I would try something like this

If "" & Me.Textbox = "" Then
     answer = msgbox"Enter data?", vbYesNo
End If
If answer = vbYes Then
    'let the user enter his value
Else
    me.textbox.value = 0
End If

[twinnyfo]

I think you want to have this validation after the user checks the check box? If this is the case, then something along these lines:

Private Sub chkCheckBox_AfterUpdate()
    If Me.chkCheckBox Then
        If Me.txtAmount = 0 Then 'assuming default value here
            MsgBox "You must enter an amount"
            Me.chkCheckBox = False
            Me.txtAmount.SetFocus
        End If
    Else
        Me.txtAmount = 0
    End If
End Sub

Hoep this hepps!