Question

Simple question but surprisingly I couldn’t find any answer in MSDN or did I miss some links ?

Answer 1

If all you want to do is open a window this is quite simple, just instantiate a new instance of a window from code and then call .Show() on the instance:

var newWindow = new NewWindow();
newWindow.Show();

You can then host UserControls within that window.

I don’t think you can open a user control without hosting it in a window, though I’ll do some tinkering to confirm that belief now.