How to hide mouse cursor?

Hi,
I wish to write an application (say a small dialog box in VC++), which should also make
the mouse cursor disappear, untill a mousemove.
I'm able to make it work, with in my dialog box, But not for the other windows present already.
Can any one help?

Ways tried:
ShowCursor(FALSE);

SetCursor(NULL);

Can anyone help?

Srikrishnan S

you can try with SetSystemCursor();
but i dont know how you will be able to know when the mouse move... (if it is not on you dialog..)