185	185: Bad name for local drive or printer
499	499: Unrecognised network error #
500	500: Access is denied.
501	501: LocalName  is already connected. 
502	502: Device and resource do not match. 
503	503: LocalName is invalid. 
504	504: ResourceName is not valid or cannot be located. 
505	505: The user profile is in an incorrect format. 
506	506: Unable to open the user profile to process persistent connections. 
507	507: LocalName is already in the user profile. 
508	508: Password is invalid. 
509	509: Network component is not started or invalid 
510	510: The network is not present. 
511	511: Device in use
512	512: Device not currently connected
513	513: Open files on device and FORCE=@FALSE
514	514: Device not currently available
515	515: Invalid Password
516	516: Insufficient memory.
517	517: Not supported in current NT version (Invalid Parameter)
1000	Win32 Network Extender