How to use the camera API

Dear,
    I found a camera API document through the zaurus website, and also its
header files, but one thing i don't know is that, if i want to use its
API, which files do i include (i mostly concern the path that I should
include, e.g. simply just #include <camera.h> or #include
<XX/camera.h>)? If it is the second one, what is the XX? Thanks a lot~

Regards,
Roy