passing variable from modal form to main form (1 Viewer)

On my main form, I have a search option that opens a modal form. When the modal form is opened, the main form remains open. The modal form determines a variable. Clicking ok on the modal form, passes the focus back to the main form and closes the modal form. How do I reload the main form based on the variable from the modal form. The modal form is using a global variable.

I figured it out.