Everything is working fine but I just need some help to get me started on variables.

I have a report called Assessment_Plans with the headings:

ID

Assessment Plan

Assessment Plan Date

I want to be able to add a custom button on the report that when a row is selected the ID of the that row will become a variable. I then the user to be taken to another report where they will see only records relating to the Assessment Plan ID from the selected row. They should then be able to create new records in the new table - let's call it Assessment_Plan_Findings which will have the headings

ID 

Assessment_Plan_ID

Findings

I'd be grateful for any help.

Thanks

Andrew