public class Office2007BlackSkin : Office2007StripSkin 

public void CreateOffice2007BlackGcTabControl()
{
    // Create a GcTabControl.
    GcTabControl gcTabControl = new GcTabControl();

    // Set the size and location of gcTabControl.
    gcTabControl.Size = new Size(200, 200);
    gcTabControl.Location = new Point(10, 10);

    // Add some tab pages to gcTabControl.
    gcTabControl.TabPages.AddRange(new GcTabPage[]
    { 
        new GcTabPage("page1"),
        new GcTabPage("page2"),
        new GcTabPage("page3"),
    });

    // Always show the close button of all tabs.
    gcTabControl.CloseButtonVisibility = CloseButtonVisibility.Always;

    // Use the Office2007BlackSkin to render gcTabControl.
    gcTabControl.Appearance = GrapeCity.Win.Containers.TabAppearance.Skin;
    gcTabControl.Skin = new Office2007BlackSkin();

    this.Controls.Add(gcTabControl);
}