I'm trying to do what I think is a simple button with discrete events for MouseDown and MouseUp:
<Button x:Name="PowerButton" Content="Power" Height="23" Width="75"
cal:Message.Attach="[Event MouseDown] = [Action PowerDown]; [Event MouseUp] = [Action PowerUp]" />
But PowerDown/PowerUp only invokes when using the right or middle mouse buttons. Is something else preventing CM from seeing the left mouse button events?