Access a parent window control(e.g a Label) inside Child page

Question

I am developing a WPF application where i have a MainWindow that has a Frame control and a Label Control inside it, i have set the source of the Frame control to one of the pages i have created, what i want is to be able to change the content of Label control (inside Main window) from my Page.xaml which is displayed inside the Frame control.

Here is an Image to further illustrate what i really want . excuse my drawing!!

Answer 1

Page page = new Page(this);  
Framme.Content = page;