Validate controls MDI Form

[Chrissie]

I have a problem with validating my textboxes.

I have 3 forms: - 1 MDI and 2 MDI Childs

Textboxes on one of the MDI Childs need to be validated. Everything works fine by using the Validate procedure as long as I stay on that MDI Child.

Private Sub txtFCS_Validate(Index As Integer, KeepFocus As Boolean)
'Some code here
KeepFocus = True
MsgBox "Wrong Value"
End Sub

As soon as I access the menu from the MDI form or I do click on the other MDI Child my textboxes don't get validated anymore.

Any idea how to fix this?