custom button to export selected rows to newsletter manager

Hello everyone,

I was looking for a solution that allow me to have a custom buttom in the list page in order to use selected rows in another environment like a newsletter manager (or maybe use phprunner as a newsletter manager!!! is that possible?)

This is my idea:

I have a "users" table with name, lastname, email, status fields

and a "newsletter" table with title, body, sent, date fields.

1. With the search box I extract all the rows from "users" table with "status=1"
   
2. I click on select all checkbox.
   
3. Using my custom buttom i should be able to be redirected to another page, say "newsletter.php"
   
   that take the selected rows from "users" table,
   
4. shows the stored newsletter messages from "newsletter" table
   
   and than for each row.users send an email containing the newsletter message selected.
   

I can smoothly do steps 1, 2, 4 but have no idea how to instruct (step 3) the custom buttom to extract and go.

Any suggestion?

Administrators?

Thank you