fgl_lastkey()
Returns the key code corresponding to the logical key that the user most recently typed in the form.
Syntax
fgl_lastkey()
RETURNS INTEGERUsage
The fgl_lastkey() function returns a numeric code corresponding to the user's
last keystroke before the function was called. For example, if the last key that the user pressed
was a lowercase a, the function returns the code 61.
The value of fgl_lastkey() is undefined in a MENU statement.
It is not required to know the specific key codes returned by fgl_lastkey(): The
fgl_keyval() function can be used to compare the key code of the last key pressed.
The fgl_keyval() function allows you to compare the last key pressed with a
logical of physical key. For example, you do not need to know the physical key defined to validate a
dialog, you can use the logical name "accept" instead. For a complete list of key codes and logical
key names, see the Key code
table.
Pay attention to the fact that this function is provided for backward compatibility: The abstract
user interface protocol is based on logical events, not only key events. For example, in GUI mode,
when selecting a new row with the mouse in a table, there is no key press as when moving in a screen
array in TUI mode. However, the runtime system tries to emulate as much as possible keystrokes from
non-keystroke events like mouse clicks. Consider reviewing the code logic, in order to use control
events of the dialog instruction such as BEFORE FIELD, AFTER
FIELD, BEFORE ROW, AFTER ROW, to detect field and record
list navigation events.