I wasnt to save the window size and location in case the user changes it so that it opens the same size the next time.  So, I'm using Properites.Settings.Default.Window<Property> where <Property> = Height, Width, POsitionTop, or PositionLeft to store the height, width, top, and left values for a XamRibbonWondow.  On WindowClosing(), I save these values. On WindowLoaded(), I set the values. However, I notice that the window shifts a bit.  It's most noticeable when I maximize the window.  I'm guessing this has something to with not having a title bar in the window. In any case, I can't make it work. Anyone have any ideas?