The answer to your first question is a YES - this is one of the main features of the RadWindowManager. Please examine the following help article on the matter:
On your second question - such information is no longer available once the client-side object of the RadWindow is destroyed. You could access the Windows collection of the RadWindowManager on the server and read the properties you need, though, yet this is rather difficult and requires a round-trip to the server. For windows you expect to need to reopen I advise that you explicitly set the DestroyOnClose property to false so that it overrides the global setting from the manager.
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