The SESSION_INFO_0 structure contains the name of the computer that established the session.

 typedef struct _SESSION_INFO_0 {
   [string] wchar_t* sesi0_cname;
 } SESSION_INFO_0,
  *PSESSION_INFO_0,
  *LPSESSION_INFO_0;

sesi0_cname: A pointer to a null-terminated Unicode UTF-16 Internet host name or NetBIOS host name of the computer that established the session.