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 s, the function returns the
code 115 (i.e. the ASCII character set code).
The value of fgl_lastkey() is undefined in a
MENU statement.
The function returns NULL if no key has been pressed.
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 static screen array in TUI mode. However, the runtime system tries to emulate as much as possible keystrokes from non-keystroke events.