[pnelsonAG]

I've been studying the difference between the working example and my code, which doesn't work.

I have a Viewport3D with the geometry in it and I have a canvas over it to draw regions of interest.   The Canvas receives mouse events so I can draw outlines and highlight things of interest in the underlying Viewport.    So it's probably eating the mouse events

Code:

   <Grid>

        <dxControls:DXViewportView Name="MainViewportView" PresentationType="DirectXImage" Margin="230,70,20,170" ClipToBounds="true">
            <Viewport3D Name="MainViewport" >

            </Viewport3D>
        </dxControls:DXViewportView>



        <cameras:TargetPositionCamera Name="Camera1" Grid.Column="0" Heading="15" Attitude="7" Bank="0" Distance="350" TargetPosition="0 0 0"
                                      ShowCameraLight="Always"
                                      TargetViewport3D="{Binding ElementName=MainViewport}"/>

        <ab3d:MouseCameraController Name="MouseCameraController1" Grid.Column="0"
                                    RotateCameraConditions="LeftMouseButtonPressed"
                                    MoveCameraConditions="LeftMouseButtonPressed, ControlKey"
                                    EventsSourceElement="{Binding ElementName=ViewportBorder}"
                                    TargetCamera="{Binding ElementName=Camera1}"/>

        
        <Canvas Name="ROIcnv" Background ="Transparent" Canvas.Top="0" Canvas.Left="0" Margin="230,70,20,170" MouseDown="ROIcnvMouseDown"  MouseUp="ROIcnvMouseUp" MouseMove="ROIcnvMouseMove" ClipToBounds="True" MouseWheel="ROIcnvMouseWheel"/>

So how do I bind to the canvas to collect mouse events from there?   Thanks in advance!