i have two comboboxes one is for COUNTRY and another is for CITIES in country
whenever i select the country from COUNTRY combobox the depended cities should have to appear in CITIES combobox
when ever selecting COUNTRY all the cities are adding to CITIES combobox,
but i want only the specific country cities should have to appear in CITIES combobox.
for this how to remove previously add validvalues from the CITIES combobox