AjaxStyle Combo box for C#.net

Question

I want a combo box which work like : 1.Allow user to enter some text, press and the ComboBox will populate itself. 2. Once item list is visible, allow user to enter text and the ComboBox will find matching rows. 3. Allow users to use the arrow keys to navigate through the displayed records. 4.Allow user to press to clear the ComboBox. 5. Allow user to select a record with the mouse or by pressing or keys. How could I do this in windows application? I've searched in internet. This can be done by AJAX Control toolkit. But this is enabled only for visual studio 2008, not for visual studio 2005. Can anybody help?? Regards, Shomen