<UserControl.Resources>
        <Style TargetType="{x:Type Canvas}">
            <EventSetter Event= "MouseRightButtonDown" _
              Handler="Canvas_PreviewMouseDown"/>
 
            <Setter  Property="ToolTip"  Value="Öffnen mit linker Maustaste," & _
              "Löschen mit STRG + rechter Maustaste"></Setter>
            <Setter Property="ContextMenu">
                <Setter.Value>
                    <ContextMenu>
                        <MenuItem Header="Bild aus Zwischenablage einfügen" >
                            <MenuItem.Style>
                                <Style TargetType="MenuItem">
                                    <EventSetter Event="Click" _
                                      Handler="MenuItem_Click" />
                                </Style>
                            </MenuItem.Style>
                        </MenuItem>
                    </ContextMenu>
                </Setter.Value>
            </Setter>
 
        </Style>
 
    </UserControl.Resources>

 Private Sub MenuItem_Click(ByVal sender As Object, ByVal e As _
   System.Windows.RoutedEventArgs)
 
 End Sub