That is a pretty unfriendly thing to do; in my mind it would need a
fairly good reason to support doing this. When the user has lots of
apps open, preventing the user from organizing their own screen space
is very irritating.

You can probably just handle the moved events and move it back...
there are various kiosk implementations that would give you a lot more
control. But I still think that in most circumstances let the OS
behave as normal.

Marc