cursor

is it possible to replace the mouse cursor without using cls?

Do you mean the command MoveMouse x,y?

the code would normally be like this:

HideMouse
While Not KeyDown(key_escape)
Cls
DrawImage newcursor, MouseX(),MouseY()
Flip
Wend

I'm trying to do it without Cls.

Ok. Now I understand. You want to use a own cursor image...(I suspect in Bmax standard, not with MaxGUI)
I'm sorry but I think that you need a cls/flip to update the cursor movement without drawing it on screen.
Or you could redraw all the screen ONLY when you move the mouse, but is the same story...

maybe it can help you, but the correct way is to draw all the screen.

HideMouse
   Xold=MouseX(); Yold=MouseY()
   GrabImage restoreback,Xold,Yold
While Not KeyDown(key_escape)
   DrawImage restoreback,Xold,Yold
'.
'.
'.
'.
   Xold=MouseX(); Yold=MouseY()
   GrabImage restoreback,Xold,Yold
DrawImage newcursor, Xold,Yold
Flip
Wend