DosPeekNmPipe

#define INCL_DOSNMPIPES

USHORT  rc = DosPeekNmPipe(Handle, Buffer, BufferLen, BytesRead,
                             BytesAvail, PipeState);

HPIPE            Handle;        /* Pipe handle */
PBYTE            Buffer;        /* Address of user buffer */
USHORT           BufferLen;     /* Buffer length */
PUSHORT          BytesRead;     /* Bytes read (returned) */
PUSHORT          BytesAvail;    /* Bytes available (returned) */
PUSHORT          PipeState;     /* Pipe state (returned) */

USHORT           rc;            /* return code */