win

    A pointer to the window.

 attr

    Video display attributes that can be blinking, boldface, reverse
    video, and underlining; they are represented by the defined
    constants _BLINK, _BOLD, _REVERSE, and _UNDERLINE. To clear
    multiple attributes, separate them with a bitwise OR operator
    (|) as follows:

    clrattr(_BLINK | _UNDERLINE);