Send via-emial button

Hello all,

Right now i have set-up thru apm 2.6 the ability to send packing slips via e-mail by printing to the apm printer. Easy enough.... NO there are still some users that cant quite grasp the concept. Regardless, what i want to do is put a epibutton on the pack id header so when a person wants to send a p/s to our customer they click the "send via e-mail" button.

Where im confused is do i have to create an event wizard selecting control type filter as epibutton then custome control btnepicustom1. What throws me is what control event do i use to print and then what would the code be.

Any help is appreciated.