Format of FGDRIVER SETVIEW variable record:
Offset	Size	Description	)
 00h	WORD	viewport's left edge in viewport units
 02h	WORD	viewport's right edge in viewport units
 04h	WORD	viewport's top edge in viewport units
 06h	WORD	viewport's bottom edge in viewport units
 08h	WORD	viewport's left edge in screen space
 0Ah	WORD	viewport's right edge in screen space