Eu tenho meu generic.xaml contendo o seguinte código:

<ControlTemplate TargetType="local:customVideoControl">

   <Grid>

          <Grid.RowDefinitions>
                     <RowDefinition Height="600"/>
                     <RowDefinition Height="200"/>
          </Grid.RowDefinitions>

           <Grid.ColumnDefinitions>
                       <ColumnDefinition Width="200"/>
                       <ColumnDefinition Width="200"/>
                       <ColumnDefinition Width="200"/>
            </Grid.ColumnDefinitions>

                    <MediaElement x:Name="customMediaPlayer" Source="{TemplateBinding CustomMediaSource}"
                                   HorizontalAlignment="Center"
                                   VerticalAlignment="Center"
                                   Height="{TemplateBinding Height}"
                                   Width="{TemplateBinding Width}"
                                  Grid.Row="0" Grid.ColumnSpan="3"
                                  />

                    <ToggleButton x:Name="playPauseBtn" Height="50" Width="50" Content="Pause" Grid.Row="1" Grid.Column="0"/>
                     <Button x:Name="prevBtn" Height="50" Width="50" Content="Prev" Grid.Row="1" Grid.Column="1"/>
                     <Button x:Name="nextBtn" Height="50" Width="50" Content="Next" Grid.Row="1" Grid.Column="2"/>

   </Grid>
</ControlTemplate>

Agora, no applyTemplate, estou acessando os controles como abaixo:

 public override void OnApplyTemplate()
        {
            base.OnApplyTemplate();

            ToggleButton playPauseBtn = GetTemplateChild("playPauseBtn") as ToggleButton;

            Button prevBtn= GetTemplateChild("prevBtn") as Button;
            Button nextBtn = GetTemplateChild("nextBtn") as Button;
            MediaElement customMediaPlayer = GetTemplateChild("customMediaPlayer") as MediaElement;

            playPauseBtn.Checked += (obj, Args) =>
                {
                    customMediaPlayer.Pause();
                    playPauseBtn.Content = "Play";
                };

            playPauseBtn.Unchecked += (obj, Args) =>
                {
                    customMediaPlayer.Play();
                    playPauseBtn.Content = "Pause";
                };



            nextBtn.Click += (obj, Args) =>
                {
                    customMediaPlayer.Source=new Uri(CustomMediaSource.ToString(),UriKind.RelativeOrAbsolute);

                };

            prevBtn.Click += (obj, Args) =>
            {
                customMediaPlayer.Source = new Uri(CustomMediaSource.ToString(), UriKind.RelativeOrAbsolute);
            };

        }

Agora eu quero acessar o nextBtn, na página em que estou implementando como

CustomVideoControl myVControl=new CustomVideoControl();

Isso criará a instância do controle, mas quero fazer algo com o clique do botão próximo e anterior, que esteja presente dentro do CustomVideoControl em generic.xaml. Qualquer ajuda será muito apreciada.

Obrigado Subhen