503
Return information about shared resources, including the name of the resource, type and permissions, number of connections, and other pertinent information. The bufptr parameter points to an array of SHARE_INFO_503 structures. Shares from all scopes are returned. If the shi503_servername member of this structure is "*", there is no configured server name and the NetShareEnum function enumerates shares for all the unscoped names.
Windows Server 2003 and Windows XP: This information level is not supported.
XP不支持啊