The LANA_ENUM structure contains the numbers for the current LAN adapters.
typedef struct _LANA_ENUM { // le UCHAR length; UCHAR lana[MAX_LANA]; } LANA_ENUM;
The LANA_ENUM structure is pointed to by the ncb_buffer member of the NCB structure when an application issues the NCBENUM command. The NCBENUM command is not part of the IBM NetBIOS 3.0 specification.