combobox autocomplete problem

[RAYLWARD102]

I've got a combobox that I created this way:

Dim cb As Control
    Set cb = UserForm3.Controls.Add("Forms.combobox.1")
    With cb
        .Top = 10
        .Left = 5
        .Height = 40
        .Width = 500
        .Font.Size = 28
        .Name = "cb1"
        .AutoWordSelect = True
        For Each cell In spTY.Range("a2:a" & iRow).Cells
            .AddItem cell.Value
        Next cell
    End With

Ok.. I've created an on-screen keyboard using dynamically created buttons. The class module code behind each of those buttons reads:

UserForm3.Controls("cb1").Value = UserForm3.Controls("cb1").Value & CmdGroup5.Caption

It does put the letters from the buttons into the combobox, but the autocomplete is not working at all like how it would when you use the keyboard. Any idea's

 

[RAYLWARD102]

its like I need to update the combobox some how. Just not sure how to. Normally the combobox detects the change but not when vba puts the characters into the combobox.... Seriously need help with this.