/LBXDATA=value (Alpha/Integrity servers only)

    Specifies a data value for the authorization protocol used
    between the LBX proxy server and the X display server. This
    qualifier must be used with the /LBXAUTHENTICATE, /PROXY, and
    /CREATE qualifiers.

    When you issue a SET DISPLAY/CREATE/PROXY/LBXAUTHENTICATE=MIT-
    MAGIC-COOKIE-1 command, use this qualifier to provide a
    hexadecimal magic cookie value to the MIT-MAGIC-COOKIE-1
    protocol.