Activate the video display attribute attr within the window. The
    setattr function acts on the stdscr window.

    Format

      #include  <curses.h>

      int setattr  (int attr);

      int wsetattr  (WINDOW *win, int attr);

1  –  Arguments

 win

    A pointer to the window.

 attr

    One of a set of video display attributes, which are blinking,
    boldface, reverse video, and underlining, and are represented by
    the defined constants _BLINK, _BOLD, _REVERSE, and _UNDERLINE,
    respectively. You can set multiple attributes by separating them
    with a bitwise OR operator (|) as follows:

    setattr(_BLINK | _UNDERLINE);

2  –  Description

    The setattr and wsetattr functions are specific to VSI C for
    OpenVMS Systems and are not portable.

3  –  Return Values

    OK                 Indicates success.
    ERR                Indicates an error.