Save or delete item in editable combobox

[Davider]

Thanks for your help, 
 
Sorry, I forgot some description, I want to store the modified list somewhere, so that after the software restarts, it can still be used 
 
Where is it saved? System variable? Registry? Ini file? Which method is most suitable?

e.g:
GetEnvVar("bak_items" bak_items)

SetEnvVar("bak_items" bak_items)