Weird combo control occurences

[RhinoBull]

After going through your code one more time here's what I found and it's something that I suggested in my previous reply: the SetFocus

If Con.Name = "cmbClass" Or Con.Name = "cmbStudentName" Then
                [b]Con.SetFocus[/b]
            End If
            '...
            ElseIf TypeOf Con Is ComboBox Then
                If Con.Style <> 2 Then Con.Text = ""

SetFocus won't get fired while in debug mode and I did mentioned that before - that's what got you confused ...