The prompt override program is passed several parameters.
A 20-character field. The first 10 characters of the field contain the
name of the command and the last 10 characters contain the name of the library.
A value for each key parameter, if any. If more than one key parameter
is defined, the parameter values are passed in the order that the key parameters
are defined in the command definition source.
A 32676-byte (32K) space to hold the command string that is created by
the prompt override program. The first two bytes of this field must contain
the hexadecimal length of the command string that is returned. The actual
command string follows the first two bytes.
For example, when defining
two key parameters for a command, four parameters pass to the prompt override
program as follows: