Here is a combobox that can filter the items in the dropdown list based on what has been typed so far. It is a good candidate for replacing my xBox class if you don't need a Quickfill/Auto-Complete or if you wanted only a dropdown that is being filtered. This uses SQL SELECT as RowSourceType.
Before running the sample, there are two things you should know outright:
Double-clicking on the textbox portion will clear DisplayValue and will restore the original SQL SELECT