Int 62 Fn 0055  u - Fgdriver V4.02 - "fg_getybox" - Get Width Of Horizont  [V]

   AX = 0055h

Return: AX = width (in pixels) of top and bottom edges of rectangles

Note:  the FGDRIVER functions are rearranged with each major release, but
     their parameters do not change (see #3145 at AX=0000h)

See Also: AX=0006h,AX=0007h,AX=0008h,AX=0063h