Aspx VB and autocomplete dropdown

See more:

ASP.NET

combobox

auto-complete

All;
I have an issue I'm trying to resolve.
How can I try and reproduce the behavior of a ComboBox in ASPx?
On my page I have a drop-down populated by a stored procedure and would like to reduce the possible options as the operator is typing. The SP sometimes returns hundreds of results and it is a pain to scroll through and find the needed one; some typing can expedite the process.

Thank you,
Marco

What I have tried:

Some jQuery snippets but unsuccessfully