typedef struct _KALPC_MESSAGE_ATTRIBUTES
{
    void *ClientContext;
    void *ServerContext;
    void *PortContext;
    void *CancelPortContext;
    KALPC_SECURITY_DATA *SecurityData;
    KALPC_VIEW *View;
    KALPC_HANDLE_DATA *HandleData;
} KALPC_MESSAGE_ATTRIBUTES, *PKALPC_MESSAGE_ATTRIBUTES;