Webservice- functions for mobile application

Hi All,

I am trying to create a mobile application for Moodle. I am able to get the courses and course details using the functions core_course_get_courses and core_course_get_contents.

But I also need to get the completion status of a course. Is there any function which provides this detail? Also does anyone have an  idea on how to implement paging during fetching courses(core_course_get_courses)

Thanks in advance