Using the CONTENTS option of the SYSTEM-HELP statement displays the HTML Help Viewer for the specified help file. You frequently use this for a Help Topics call from the help menu. The following code example demonstrates a Help Topics call:

ON CHOOSE OF MENU-ITEM Help_Topics DO:
  SYSTEM-HELP myhelp.chm CONTENTS.
END.

For example, when the user chooses the Help Topics from the Help menu in the Procedure Editor's main window, the Help Viewer appears, as shown in the following figure.