The MAPI_DestroyAddressList() function removes the specified address list from memory.
MAPI_DestroyAddressList(address_list_ID)
• address_list_ID – The ID of the address list to remove from memory.
A boolean. True indicates the address list was removed from memory, while false indicates it was not.
After you are done using an address list, be sure to use the MAPI_DestroyAddressList() function to release memory used by the list.