The
item_value() function returns value of the item. If the item has been selected then this value will be TRUE. The value can also be set by calling
set_item_value() to set the value to a defined state. Setting the value to a value other than TRUE or FALSE will have undefined results. The
item_selected() function returns the number of items that are selected in the menu, that is the number of items whose value is TRUE. The indexes of the selected items will be returned in
array which will be dynamically allocated to hold the number of indexes. It is the responsibility of the caller to release this storage by calling
free(3) when the storage is no longer required. If there are no elements selected in the items array then
item_selected() will return 0 and
array will be NULL. If an error occurs
item_selected() will return one of the below return values which are less than 0.