Jump or Call another procedure

How do I jump or call one procedure from another

First I do not need to pass any data from one to the other. What my code does is this, button3_click loads 19 listboxes. Button4_click evaluates those boxes and places the results into Listbox20. I now need to go back to the button3_click procedure which will rescan the data. Right now I use application.restart() which is a pain as I then have to go through the opening dialog again. I'm hoping to be able to just jump or call the button3_click procedure. Any ideas

Thanks, RobertMC