The LLC_DIR_OPEN_ADAPTER_PARMS structure is the DLC parameter table for the LLC_DIR_OPEN_ADAPTER command. You pass a pointer to this structure using the pParameterTable member of the CCB_PARMS union.
typedef struct {
    PLLC_ADAPTER_OPEN_PARMS pAdapterParms; 
    PLLC_EXTENDED_ADAPTER_PARMS pExtendedParms; 
    PLLC_DLC_PARMS pDlcParms; 
    PVOID pReserved1; 
} LLC_DIR_OPEN_ADAPTER_PARMS, *PLLC_DIR_OPEN_ADAPTER_PARMS;
This command prepares the protocol drivers for normal network communications on all network adapters for a given application. You must issue this command successfully before any network communication can start. The application cannot issue the command unless the adapter is in a logically closed state, which exists after one of the following occurs:
AcsLan, CCB_PARMS, LLC_ADAPTER_OPEN_PARMS, LLC_DLC_PARMS LLC_EXTENDED_ADAPTER_PARMS