RibbonTab Class

​public class RibbonTab : System.Windows.Forms.TabPage

​// create a new RibbonTab control and set the text (tab title)
RibbonTab myRibbonTab = new RibbonTab();
myRibbonTab.Text = "MyRibbonTab";

// create a new RibbonGroup
RibbonGroup myRibbonGroup = new RibbonGroup() { Text = "My Group" };

// make the dialog launcher icon invisible
myRibbonGroup.DialogBoxLauncher.Visible = false;

// add the new RibbonGroup to the RibbonGroup collection
// of the newly created RibbonTab
myRibbonTab.RibbonGroups.Add(myRibbonGroup);

// create a new RibbonButton
RibbonButton rbtnClickMe = new RibbonButton()
{
    Text = "Click me!",
    IsAddToQuickAccessToolbarEnabled = true,
};

// set some properties of the button and attach a "Click" event
rbtnClickMe.ToolTip.Title = "Tooltip Title";
rbtnClickMe.ToolTip.Description = "Tooltip Description";
rbtnClickMe.DisplayMode = IconTextRelation.LargeIconLabeled;
rbtnClickMe.LargeIcon = Image.FromFile("previewclose.png");
rbtnClickMe.Click += RbtnClickMe_Click;
rbtnClickMe.BackColor = Color.LawnGreen;

// add the button to the RibbonGroup
myRibbonGroup.RibbonItems.Add(rbtnClickMe);

// add the newly created RibbonTab to the Ribbon control
ribbon1.Controls.Add(myRibbonTab);

// set the selected tab to the new RibbonTab
ribbon1.SelectedIndex = ribbon1.TabCount - 1;