Mouse.OverrideCursor = Cursors.None;

to remove the override, I believe you set Mouse.OverrideCursor = null;

Hope these also help:
See this post from the WPF forum.

Here is a search query for all topics there with the word "Cursor" in it.
MSDN: FrameworkElement.Cursor
MSDN Sample: Changing the Cursor Type Sample

Thanks, Rob

Rob Relyea | Program Manager, WPF & Xaml Language Team
robrelyea.com | /blog | /wpf | /xaml