Hello Chris Williams,
When you open a page in the RadPane, an IFRAME element is added to the RadPane and the page is opened in that IFRAME. Therefore, the approach would be the same as in the case you have just a simple IFRAME, instead of a RadPane.
As you probably understand, the way to achieve the desired result would not be very clean. You will have to use the clientside approach and in the function on the main page, you can postback the page (using __doPostBack for example) or you can use our RadAjax, to perform a callback (using the AjaxRequest method
) and execute your serverside code.
the Telerik team