public abstract class GcGroupBoxControlBase : GrapeCity.Win.Common.PlusPakControlBase 

private void CreateMyGcRadioGroupBox()
{
    GcRadioGroupBox gcRadioGroupBox1 = new GcRadioGroupBox();

    // Set gcRadioGroupBox1's location.
    gcRadioGroupBox1.Location = new Point(10, 10);

    // Set up the group style for this control.
    gcRadioGroupBox1.GroupStyle = GroupStyle.TopLine;

    // Set HeaderType and Header's text.
    gcRadioGroupBox1.HeaderType = HeaderType.ExpanderAndText;
    gcRadioGroupBox1.Text = "&Collapse All";

    // Enable the header and items to support the access key.
    gcRadioGroupBox1.UseMnemonic = true;

    // Use Flat theme appearance to draw gcRadioGroupBox1.
    gcRadioGroupBox1.FlatStyle = GrapeCity.Win.Common.FlatStyleEx.Flat;

    // Create some radio button items.
    RadioButtonItem[] items = new RadioButtonItem[] 
    {
        new RadioButtonItem("item&1"),
        new RadioButtonItem("item&2"),
        new RadioButtonItem("item&3"),
        new RadioButtonItem("item&4"),
        new RadioButtonItem("item&5"),
    };

    // Add some items.
    gcRadioGroupBox1.Items.AddRange(items);

    // Customize the appearance of header through HeaderSetting.
    gcRadioGroupBox1.HeaderSettings.ForeColor = Color.Tomato;
    gcRadioGroupBox1.HeaderSettings.Font =
        new System.Drawing.Font("Arial", 9.75F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((byte)(0)));
    gcRadioGroupBox1.HeaderSettings.TextEffect = GrapeCity.Win.Common.TextEffect.Raised;

    // Customize the appearance of items through ItemSettings.
    gcRadioGroupBox1.ItemSettings.ForeColor = Color.Blue;
    gcRadioGroupBox1.ItemSettings.Font =
        new System.Drawing.Font("Arial", 8.25F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(0)));
    gcRadioGroupBox1.ItemSettings.TextEffect = GrapeCity.Win.Common.TextEffect.Raised;

    // Customize the layout of items through LayoutSettings.
    gcRadioGroupBox1.LayoutSettings.LayoutMode = LayoutMode.Table;
    gcRadioGroupBox1.LayoutSettings.Orientation = System.Windows.Forms.Orientation.Vertical;
    gcRadioGroupBox1.LayoutSettings.RowCount = 3;
    gcRadioGroupBox1.LayoutSettings.HorizontalAdjustment = GrapeCity.Win.Containers.LineAdjustment.Average;
    gcRadioGroupBox1.LayoutSettings.VerticalAdjustment = GrapeCity.Win.Containers.LineAdjustment.Average;

    // Set gradient effect for gcRadioGroupBox1.
    gcRadioGroupBox1.GradientEffect = new GrapeCity.Win.Common.GradientEffect(
        GrapeCity.Win.Common.GradientStyle.DiagonalDown,
        GrapeCity.Win.Common.GradientDirection.NotSet,
        System.Drawing.Color.White,
        System.Drawing.Color.Bisque);

    // Set pattern effect for gcRadioGroupBox1.
    gcRadioGroupBox1.PatternEffect = new GrapeCity.Win.Common.PatternEffect(
        GrapeCity.Win.Common.PatternStyle.DottedGrid,
        System.Drawing.Color.LightPink);

    // Update the text after gcRadioGroupBox1 expand or collapse.
    gcRadioGroupBox1.Expanded += new EventHandler(GcRadioGroupBox1_Expanded);
    gcRadioGroupBox1.Collapsed += new EventHandler(GcRadioGroupBox1_Collapsed);

    // Change the item appearance when item is checked or unchecked.
    gcRadioGroupBox1.CheckedItemChanged += new EventHandler<CheckedItemChangedEventArgs>(GcRadioGroupBox1_CheckedItemChanged);

    // Add gcRadioGroupBo1 to the form.
    this.Controls.Add(gcRadioGroupBox1);
}

private void GcRadioGroupBox1_CheckedItemChanged(object sender, CheckedItemChangedEventArgs e)
{
    if (e.CurrentCheckedItem != null)
    {
        // Use special styles for checked items.
        e.CurrentCheckedItem.ForeColor = Color.Red;
        e.CurrentCheckedItem.Font = new Font(e.CurrentCheckedItem.Font, FontStyle.Bold);
    }

    if (e.OriginalCheckedItem != null)
    {
        // Reset these properties will cause the properties to retreive their values from gcRadioGroupBox1.
        e.OriginalCheckedItem.ForeColor = Color.Empty;
        e.OriginalCheckedItem.Font = null;
    }
}

private void GcRadioGroupBox1_Collapsed(object sender, EventArgs e)
{
    (sender as GcRadioGroupBox).Text = "&Expand All";
}

private void GcRadioGroupBox1_Expanded(object sender, EventArgs e)
{
    (sender as GcRadioGroupBox).Text = "&Collapse All";
}