   DirectPlay quit working... or DNPERR_INVALIDAPPLICATION
  I'm working on making a DirectPlay tutorial/foundation-class kind of thing.  I've pretty much got everything worked out, but I've come to an impass.  My client can't connect to my server any more.  It was working fine yesterday, and now its not.  The issue seeems to involve the GUID.  The DPN_MSGID_CONNECTION_COMPLETE event in the client is returning a DPNERR_INVALIDAPPLICATION error, which, according to the DX9 SDK documentation, means that the GUID in the client does not match the server.  I know they do match however, because they share the same include file which contains the GUID.  If anybody has any clue what might cause this, please let me know.Also, if you would be interested in my DPFC (DirectPlay Foundation Classes) let me know.[edited by - Fourty_Two on December 8, 2003 6:21:01 PM]
  grr.  Stupid.  One line of code got deleted somehow."_guid = guid;" made all the difference. 