What I would suggest in such scenario is to get a reference to the parent RadWindow and to call its setSize() methods.
e.g. (in the context of the content page)
oWindow = window.radWindow;
oWindow = window.frameElement.radWindow;
oWnd = radopen(
wrappingWindow = GetRadWindow();
All the best,
the Telerik team
Do you want to have your say when we set our development plans?
Do you want to know when a feature you care about is added or when a bug fixed?
Telerik Public Issue Tracking
system and vote to affect the priority of the items