I can get a button to appear and be clickable in the drop down list of a combo box, but I cannot get the selected combo box item (the drop list is closed) to have the button be clickable. It always skips the button click and just opens the drop down list. I basically want the Button_Click event handler that I setup to be called once it is clicked. Here is my sample combo box that shows the button but is not clickable once it is in the selected item:

<ComboBox x:Name="MyCombo" Width="200" Height="30" ItemsSource="{Binding ListCombo}">
        <ComboBox.Resources>
            <DataTemplate DataType="{x:Type local:ComboItemClass}">
                <StackPanel Orientation="Horizontal">
                    <TextBlock Text="{Binding Path=SampleText}" Width="120" />
                    <Button Width="20" Content="..." Click="Button_Click"/>
                </StackPanel>
            </DataTemplate>
        </ComboBox.Resources>
    </ComboBox>