how to make list like effect in csharp

Question

hi.

i know how to query and extract data in csharp. i need to type in textbox(e.g) and need a list open with possible
items already populated, e.g like writing app in textbox shows a list of words apples, applications. etc etc may be i donot know which .net control is used for that affect.
note: i know how to use sql query with wildcard character.

thx.

mansoor