Sending report to customer through .

Hi Experts,

I have created a custom document page i added action to generate invoice for this page and send custom report to customer.

Action Name ( Generate Invoice).

I want to perform two function on this action.

1 To Generate invoice ( 1st function are completed and its generate invoice).

2. Send custom report to customer.

Now i am trying when i click on action "Generate Invoice" it will generate invoice (Invoice are generating ) and send my custom report to the customer.

how to send custom report to customer ??