ive run into this issue before and i had trouble trying to explain what the problem was and ended up moving on. Now im at the point where I HAVE to fix this, there is no other way to achieve what I need to do.
When you populate a combobox with a list count, it will display at maximum 30 list items. I have tried repeatedly with no avail so far to make the combobox list scroll if the list count is greater then 30 items. So far, no luck. Is this even possible with UC or am I missing something in the design time?