Material shortage report after mrp run.

Dear Experts ,

we have a requirement where we need to develop the material shortage alv report, when i searched in SCN i got information like we can achieve this by

using the functional module MD_STOCK_REQUIREMENTS_LIST_API.

as i am beginner i dont have much knowledge on functional module,so can anybody suggest in detail which all the fields are necessary to get available quantity ,requirement and shortage quantity.

Thanks and regards

bharagvi