Access a dropdown list and its properties in the editable dropdownlist user control

I have created a editable dropdownlist usercontrol. I took one textbox and one dropdown list to make editable dropdown list.
When i am using this user control in any of my pages, i am not able to access dropdown list exclusively. I want that when i use this user control in any of the page i should be able to access only the drodown list with its properties like selected index, selected item and selected value.

Please reply.

Thanks.