Universal key function events

The following table describes universal key function events.

Universal key function events
Event	Affected widgets	AVM action
`BELL`	All except control container, menu, menu item, and submenu	Trigger dependent (typically used to execute the BELL statement).
`END-ERROR`	All except menu, menu item, and submenu	For the first input operation of the program, raise the ENDKEY condition. For subsequent input operations, raise the ERROR condition.
`ENDKEY`	All except menu, menu item, and submenu	Raise the ENDKEY condition.
`ERROR`	All except control container, menu, menu item, and submenu	Raise the ERROR condition.
`GO`	All except menu, menu item, and submenu	Submit the input values for this frame.
`HELP`	All except menu, menu item, and submenu	Invoke application help.