Linking Course / Course Type with the PERNR

Hi All

I am new to ABAP HR

i have few queries

1) How to get the list of pernr which are linked to a Course / Course Type

2) How to link Org Unit with the Pernr

FYI. i have a selection screen with the above details. i need to fetch the pernr based on above input and do some processing.

please help on this.

Regards

Chaitanya.A