Changes the default aspect-ratio correction factor.
function SetAspectRatio(Xasp, Yasp: Word): Word;
SetAspectRatio is used to change the default aspect ratio of the current graphics mode. The aspect ratio is used to draw circles. If circles appear elliptical, the monitor is not aligned properly. This can be corrected in the hardware by realigning the monitor, or can be corrected in the software by changing the aspect ratio using SetAspectRatio. To read the current aspect ratio from the system, use GetAspectRatio.
Must be in graphics mode.