Feature request: Combobox with in-text search

I would like to express my support for feature request '2634: In-text search reducing the available entries'.

When the combobox contains a lot of items, it is very valuable that the combobox reduces the number of items to the items that contains the typed in text. A lot like the code completion in e.g. Delphi

I found a very nice C# implementation of this:

Have you considered TAdvSearchEdit?

AdvSearchComboBox was exactly what I was looking for.
Thank you very much!