Movinf the mouse pointer

[Luca Cappa <luca cappa i-medlab com>]

Hello all,

I have implemented a way to rotate the view around a point in my 3D 
application, by using the mouse pointer: in
fact when the left mouse button is hold down and the mouse is moved, the 
view rotates around. When this process
is going on, the mouse is hidden (i.e. its shape is an empty image).
My problem is that I would like to reset the mouse pointer position 
after each delta movement has been detected: in this
way the mouse pointer is always placed in the original position it was 
when the mouse button was pressed. I do not know
how to do it, any help?

TIA
Luca