How To ZwCreateFile on \device\atalkddp Requires Protocol # (194635)

The information in this article applies to:

Microsoft Win32 Device Driver Kit (DDK) for Windows NT 4.0

This article was previously published under Q194635

SUMMARY

A TDI Client Calling ZwCreateFile on \device\atalkddp must specify a protocol number.

MORE INFORMATION

Passing in \device\atalkddp to ZwCreateFile produces an error. You must specify a protocol number as follows:

   \device\atalkddp\0  for DDP protocol
   \device\atalkddp\2  for NBP protocol
   \device\atalkddp\3  for ATP protocol
   \device\atalkddp\7 for ADSP protocol

WinObj shows the device as \device\atalkddp. It is not trivial to discover these device names.

Modification Type:	Minor	Last Reviewed:	9/2/2004
Keywords:	kbhowto kbNDIS KB194635