I am new here (hello all) and need some help

I searched for a thread that may address my issue but found none

what I need to do is to change the buffer on a combo box which is populated with client numbers, currently if the client number is 123456 and you select "1" the combo box by default takes you to the client number with the lowest client number closest to 100000, what I need is to be able to select "1" then "2" then "3", etc. until either the desired client number is found or I select 6 characters

here are some of my settings for my combo box:
DropDownStyle = DropDownList
DrawMode = DropDownList

any help would be much appreciated...

Michael