check if element of a control array exists

[rxbagain]

Using VarType will work IF the control has a default member and that default member returns value other than vbObject. If the control doesn't have a default member, it will always return false.

One solution is to enumerate the items in the control array and compare the Index of each item.

Function CheckCtrlIndex(ctrlArray As Object, ByVal idx As Integer) As Boolean
   Dim result As Boolean, ctrl As Control
   For Each ctrl In ctrlArray
      If ctrl.Index = idx Then
         result = True
         Exit For
      End If
   Next ctrl
   CheckCtrlIndex = result
End Function

Hope it will help you