Int 62 Fn 0051  u - Fgdriver V4.02 - "fg_getxbox" - Get Width Of Vertical  [V]

   AX = 0051h

Return: AX = width (in pixels) of left and right 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=006Bh