This parameter points to the installation-defined field parameter list. Each entry in the parameter list points to the parameter entry for an installation-defined field on the logon panel. The logon processor sets the key field of this parameter entry to X'02' if you have defined fields for your installation and to X'00' if you have not defined fields. If you have defined fields for your installation, the length field is set by the logon processor to the length of the installation panel field parameter list.