Disable the MouseWheel

There is no property that disables the mouse wheel in RadCoverFlow, but you could inherit the control and override the OnMouseWheel method, without calling base:

public class CoverFlow : RadCoverFlow 
{ 
    protected override void OnMouseWheel(System.Windows.Input.MouseWheelEventArgs e) 
    { 
        //base.OnMouseWheel(e); 
    } 
} 

Then use the new control in XAML:

<local:CoverFlow> 
       <Rectangle Fill="Red" Width="200" Height="200" /> 
       <Rectangle Fill="Green" Width="200" Height="200" /> 
       <Rectangle Fill="Blue" Width="200" Height="200" /> 
       <Rectangle Fill="Magenta" Width="200" Height="200" /> 
</local:CoverFlow>