yes, it's the last Edited selected value and it can be used almost everywhere.
Eg to select some value from list, edit it - and use that for next data processing.
It's something like DropList - which can be edited - although i didn't find that feature in it, that's why proposal for last selected value.
Most gui toolkits have it - win32 native also has it.
It's a must for quite many apps.
Besides this - i didn't find a way how to get/set specified index value, that's why 1st proposal 'GetDropChoice'.
If there is - you can give me a hint about it.