Creates an edit field at row and column, with
specified text and background color with a length of maxlen. Use
focustedit: to draw the edit field and wait for input.
Parameters:
name:
The name of the edit field.
row: The screen row of the edit
field.
col: The column of the first
character of the edit field. Be sure that col + maxlen does not go off
the edge of the screen.
fcolor: The text color.
bcolor: The background color of
the edit field.
maxlen: The maximum length of
the edit field.