Graphics 640,480

dxSetBuffer dxBackBuffer()

x=320
y=240

; infinite mouse movement

Repeat
dxCls

xs=dxMouseXSpeed() ; see how far the mouse has been moved
ys=dxMouseYSpeed()
dxMoveMouse 320,240 ;put the mouse back in the middle of the screen

x=x+xs ;adjust mouse co-ords
y=y+ys

If x>dxGraphicsWidth()-1 Then x=x-dxGraphicsWidth() ;wrap screen
If x<0 Then x=x+dxGraphicsWidth()
If y<0 Then y=y+dxGraphicsHeight()
If y>dxGraphicsHeight()-1 Then y=y-dxGraphicsHeight()

dxText x,y,"X",True,True

dxFlip

Until dxKeyHit(1)

End