Set ClickMode for all Button-like Controls in Silverlight

I'm looking for an easy way to set ClickMode="Pressed" on every Control in my Silverlight Application (that inherits from ButtonBase obviously).

The solution should also access any ButtonBase-Control that is part of a controltemplate like ComboBox of SilverlightToolkit.

Do i have to create a custom theme for this? If yes, how do i reuse an existing theme and just override this property?

Thanks in advance.

You actually answered your own question. Yes, you can use an existing style to ensure the ClickMode property is set on every ButtonBase control in your app.

Here is a style that will get you going. This is an un-named style which will ensure that any control that extends from ButtonBase will inherit this style.

 <Style TargetType="ButtonBase">
        <Setter Property="ClickMode" Value="Pressed"/>
 </Style>