[Behavior] Shortcut keys [Supported] Shortcut keys work as usual, except where noted in the "Not supported" column. [Not supported] 
Windows Forms shortcut keys that are handled at the preprocessing stage always take precedence over WPF shortcut keys. For example, if you have a ToolStrip control with CTRL+S shortcut keys defined, and there is a WPF command bound to CTRL+S, the ToolStrip control handler is always invoked first, regardless of focus. Windows Forms shortcut keys that are handled by the KeyDown event are processed last in WPF. You can prevent this behavior by overriding the Windows Forms control's IsInputKey method or handling the PreviewKeyDown event. Return true from the IsInputKey method, or set the value of the System.Windows.Forms.PreviewKeyDownEventArgs.IsInputKey property to true in your PreviewKeyDown event handler.