Hi i new in this comunity i download blender but i dont how create a interactive movement of the camera whith the mouse i try to use this to create a simple fps.Please helpme.
Tanks. 
you need to use python for fps movement because the mouse logicbricks do not give you access to how the mouse has moved otherwise
please try to learn the other basics of gameblender before attempting something like this:
http://home.earthlink.net/~nwinters99/temp/fps_controls.blend
but while on the topic, I ranted about how I did some of the stuff there:
http://www.geocities.com/z3r0_d/files/fps_parts_tut.zip