BUTTON

          GUI\BUTTON "Command" Button ["Title" Helple [OptionTitle]]
                        Creates a button widget  to  execute  the  specified
    "Command".

    If no "Title" is given, the button will have  no  associated  variables,
    and will appear with other similar buttons at the top of the window.

    If a "Title" argument is present, a  "secondary  parameters"  window  is
    created.  In the main window, the "title" appears followed by 3 buttons:
    one with the button name,  one  pointing  to  the  secondary  parameters
    window,  and  a  "HELP"  button. All subsequent LET commands will create
    widgets in this secondary window, until  a  new  GUI\BUTTON  command  is
    typed.  "Helple"  specifies a text file where the help for the variables
    can be found, and "OptionTitle" is a title for the secondary window (and
    associated button).