DosQueryNPipeInfo uses this data structure for level-1 information.

typedef struct _PIPEINFO {
  USHORT     cbOut;      /*  Actual size of the buffer for outbound data. */
  USHORT     cbIn;       /*  Actual size of the buffer for inbound data. */
  BYTE       cbMaxInst;  /*  Maximum number of pipe instances. */
  BYTE       cbCurInst;  /*  Current number of pipe instances. */
  BYTE       cbName;     /*  Length of szName. */
  CHAR       szName[1];  /*  Name of the pipe. */
} PIPEINFO;

typedef   PIPEINFO   * PIPEINFO ;