I am a new for symbian program. I don't know how to get back the value from the setting list after editing by user. Can anyone help me to solve this problem, thx a lot.
There is one nice example of setting list in SDK (Series60Ex\settinglist) and your data are in CAknExSettingListItemData class, so you can get it from there.
Calling CMpShoppingListSettingsListbox::StoreSettingsL() will store settings to the variables you passed (by reference) to the XXXSettingItem when it was created (probably in CAknSettingItemList::CreateSettingItemL() ).