focustcheck: will draw a checkbox on the
screen and wait for input. If Rx contains 1, a check mark will be
printed. If Rx is 0 or undefined, then no check mark will be printed.
focustcheck: returns if
either the Enter or Tab key is pressed and the current value of the
widget will be placed in Rx. Use the spacebar to toggle the value of
the widget. Rx will be 1 if widget is checked or 0 if
not checked.
Parameters:
Rx: The
value of the widget: 1 if checked, 0 if not checked.
name: The name of the tcheck
field defined in tcheck:.