Function Assistance and notes

        The Window BOSS's functions fall into two major groups, those
        that manipulate windows and those that deal with the video or
        keyboard interface at a relatively low level.  All window
        manipulation functions being with the prefix "wn_" as in
        "wn_open", while all video and keyboard based functions begin
        with "v_" or "_" as in "v_getch" and "_putch".  This convention
        makes it easy to remember where to look when you want to do
        something.  Additionally, there are several global functions
        which which begin with "wns_".  These functions, although visible
        to the outside world, are used internally by The Window BOSS.

        The Window BOSS has been tested on the IBMPC/XT/AT and 3270 PC
        equipped with monochrome, CGA, and EGA video boards. All
        functions with the exception of v_sctype(), which does not do
        well on the 3270 PC, work as specified.

        Several functions require an attribute byte.  The attribute byte
        contains background specific data in the upper 4 bits and
        foreground specific data in the lower 4 bits.  Color and bit
        definitions can be found in windows.h. You can use a statement of
        the form: atrib = ((BLUE << 4) | WHITE); to set the attribute to
        the correct form.  The preceding example would result in a BLUE
        background with WHITE characters.  The macro v_setatr in
        windows.h can also be used.