Hello Geoff.

>> It was my intention to hold the key range to a null set until about two or three characters and then 'pop' the combobox with the remaining set. This could still be quite large 50+. The user can also put in partial street number to further filter the combobox. <<

It is my gut feeling here that this is the wrong implementation, but I could be wrong < s >. Almost every system that I have ever seen for getting addresses asks for a zip code first in order to narrow the search.

Good luck.