How to set Custom-Field type column on SharePoint Application Page?

Question

I have page layout for my sharepoint news. I have control where administrator can set few checkboxes. How can i set that selected choices to custom field in my news item?

I got events reciever but i dont have access to my page layout controls there. I need some event like "SaveButtonClick" or something similar...

Answer 1

1. Add new hidden field to content type.

2. On page postback save your data from custom controls to hidden fields.

3. In event reciever i can use now data from my hidden fields.