C>S 0x55 SID_AUTH_ACCOUNTCHANGE Message Id:0x55 Message Name:SID_AUTH_ACCOUNTCHANGE Direction:Client to Server Used By:Warcraft III The Frozen Throne, Warcraft III Reign of Chaos Format:(UINT8) [32] Client key (A) (STRING) Username Remarks This message is used to change the client's password.
BNETDocs 
