-- Command: setvar NAME/A, VALUE/F
     This command will set an internal `MUIRexx' variable to any value
     (stored as a string) which can be retrieved or reset later within
     the same application (not necessarily the same script).  This
     ability can be used to pass information between `ARexx' scripts
     used in the same application. Note that variables may also be used
     in place of object ID values, in which case the value of the
     variable will be used as the actual object ID (this value must be
     a string 5 characters or less, but the variable name can be any
     length).

        * NAME - this argument defines the variable name.

        * VALUE - this argument defines the value of the variable and
          can consist of any characters.