showtedit: will draw an edit field on the
screen. If Rx contains some text, this text will be
printed on the screen when the widget is drawn. showtedit: only draws
the widget on the screen and does wait for input.
Parameters:
Rx: The
text of the edit field. If Rx contains data when showtedit: is called,
the text will be printed to the screen.
name: The name of the edit
field defined in tedit:.