Sets the cursor visibility.
Curses Library (libcurses.a)
#include <curses.h>
  int curs_set(int visibility);
The curs_set subroutine sets the appearance of the cursor based on the value of visibility:
Value of visibility   Appearance of Cursor
  | Item | Description | 
|---|---|
| 0 | invisible | 
| 1 | terminal-specific normal mode | 
| 2 | terminal-specific high visibility mode | 
The terminal does not necessarily support all the above values.
| Item | Description | 
|---|---|
| Visibility |   Sets the cursor state. You can set the cursor state to one
of the following:  
  | 
If the terminal supports the cursor mode specified by visibility, then the cur_set subroutine returns the previous cursor state. Otherwise, the subroutine returns ERR.
To set the cursor state to invisible, use:
curs_set(0);