Syntax:  NEW MENU LABEL menu_label tpu_command mnemonic_character

  Defines a new menu label that can be added to a pull-down or pop-up
  menu.

  The definition of the label is a text processing utility (TPU)
  statement that is executed when a menu entry using this label is
  selected from a menu.  The character used as a mnemonic must be a
  single character that occurs within the label name.

  You can use any command from LSE's Portable command language within
  the definition of a menu label.  To view a list of all available
  Portable commands, either choose the "On Commands" entry in the Help
  pull-down menu, or enter the command PLSE HELP.  To transform a
  Portable command into a TPU procedure, prefix the command with "LSE_"
  and substitute underscores for any spaces.  Add parameters within
  parentheses, and separate them with commas.  View the existing label
  definitions in the Menus...  dialog box for examples.

  On OpenVMS systems, VMSLSE commands may also be used within menu
  label definitions by calling the LSE$DO_ COMMAND procedure, with the
  VMSLSE command enclosed within quotes.