AutoComplete Text Box Text

I need to speed up this Project of predicting what the user types in a Textbox. VB6 Application attached. In the Suburbs Textbox, Type any Suburb Name thats in the [login to view URL] file ( Mostly beginning with 'A' ) The code finds the Name and completes it. If the Name isn't there by pressing Enter on the Keyboard, the New Name is added to the Text File. I have created a AddressBook using this AutoUpdate concept so the User can add their own Suburbs, Towns, Cities etc. The True [login to view URL] file is possibly over 5000 Names and too large to read and update like the smaller sized Txt Files are. Is there a Better Way? If so How? and What Price am I looking at if I supply the source code to the full VB6 Application, for you to fix it. ## Deliverables Complete and fully-functional working program(s) in executable form as well as complete source code of all work done. Complete copyrights to all work purchased. ## Platform Windows 98 Windows 2000 Windows XP ## Deadline information Completion ASAP