File widget Implemented in desinger

How to add images.videos or File to your app:
i) create system type with type_of any st like File,Image,Video
  This will add a browse filed while adding instance to app
ii)  for example : " Enrollement" is app member_of "GAPP" and "student" is collection of "Enrollment".
and "student" have type_of as "File". then "student" instance have browse filed to upload image ,video or any file