How to customize the style of tooltip in WPF RichTextBox (SfRichTextBoxAdv) control?

<!-- Defines the custom style for tooltip. -->
<Style x:Key="ToolTipStyle" TargetType="{x:Type ToolTip}">
    <Setter Property="OverridesDefaultStyle" Value="True"/>
    <Setter Property="SnapsToDevicePixels" Value="True"/>
    <Setter Property="BorderThickness" Value="1"/>
    <Setter Property="BorderBrush" Value="#2D2D2D"/>
    <Setter Property="Background"  Value="#000000" />
    <Setter Property="Foreground" Value="#FFFFFF"/>
    <Setter Property="Template">
        <Setter.Value>
            <ControlTemplate TargetType="{x:Type ToolTip}">
                <Border x:Name="Root" CornerRadius="2" BorderThickness="{TemplateBinding BorderThickness}" BorderBrush="{TemplateBinding BorderBrush}" Background="{TemplateBinding Background}">
                    <ContentPresenter Margin="2" HorizontalAlignment="Center" VerticalAlignment="Top"/>
                </Border>
                <ControlTemplate.Triggers>
                    <Trigger Property="IsOpen" Value="False">
                        <Setter TargetName="Root" Property="Visibility" Value="Collapsed"/>
                    </Trigger>
                </ControlTemplate.Triggers>
            </ControlTemplate>
        </Setter.Value>
    </Setter>
</Style>
 
<!-- Defines the customized tooltip. -->
<ToolTip x:Key="CustomToolTip" Style="{StaticResource ToolTipStyle}"/>

<!-- SfRichTextBoxAdv control with customized tool tip. -->
<RichTextBoxAdv:SfRichTextBoxAdv x:Name="richTextBoxAdv" ToolTip="{StaticResource CustomToolTip}" xmlns:RichTextBoxAdv="clr-namespace:Syncfusion.Windows.Controls.RichTextBoxAdv;assembly=Syncfusion.SfRichTextBoxAdv.Wpf"/>