Message-queue information structure.

typedef struct _MQINFO {
  ULONG     cb;         /*  Length of structure. */
  PID       pid;        /*  Process identity. */
  TID       tid;        /*  Thread identity. */
  ULONG     cmsgs;      /*  Message count. */
  PVOID     pReserved;  /*  Reserved. */
} MQINFO;

typedef   MQINFO   * PMQINFO ;