hpipe (HPIPE) - input

The named-pipe handle to query.

(The server handle is returned by DosCreateNPipe; the client handle is returned by DosOpen).

infolevel (ULONG) - input

Level of the required pipe information.

Only levels 1 and 2 are supported.

pBuf (PVOID) - output

A pointer to the storage area in which the requested level of named-pipe information is returned.

Level 1 File Information

Information about the pipe itself is returned in the form of a PIPEINFO structure.
Level 2 File Information
For LAN Manager, LAN Server, and other LAN-based named pipe handles, the buffer will contain the unique 4-byte identifier of the client. Otherwise, this field returns NULL.

cbBuf (ULONG) - input

The length, in bytes, of pBuf.

ulrc (APIRET) - returns

Return Code.

DosQueryNPipeInfo returns one of the following values:

• NO_ERROR 111
  ERROR_BUFFER_OVERFLOW
  124
  ERROR_INVALID_LEVEL
  230
  ERROR_BAD_PIPE
  For a full list of error codes, see Errors.

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