Trapping textChanged event in CommandBarComboBox

Question

Hello,

I'm writing an outlook add-in, which adds a toolbar with a button, and a combobox, of CommandBarComboBox type.

As far as I can see, the only event which this control handles, is Change, which is going into effect only after pressing Enter/Tab. I want to handle the key presses as soon as the text changes, much like the the TextChanged event of a text box control.

Is there such a way? Can I get this event from the application level? Should I extend CommandBarComboBox? If so, how?

I'm currently writing in VB.NET, but if I must I can move to C# or C++.

The Office version is 2003, and I'm using VS2008.

Thanks