How to change lable of button on Ribbon (Word Add In VSTO) when click button at CustomTaskPane

Question

I've create two buttons, Status button with default "Open" in my Word add-in Ribbon and ChangeStatus button at my CustomTaskPane.

How to change lable of Status button from "Open" to "Close" (on Word add-in Ribbon) when click ChangeStatus button at CustomTaskPane.

This code Ribbon:

using System.Windows.Forms;
using Microsoft.Office.Tools.Ribbon;
using Office = Microsoft.Office.Core;
namespace TestWordAddIn
{
    public partial class Demo
    {
        private Detail myDetail;
        private Microsoft.Office.Tools.CustomTaskPane myCustomTaskPane;
        private void Demo_Load(object sender, RibbonUIEventArgs e)
        {
        }

        private void btnStatus_Click(object sender, RibbonControlEventArgs e)
        {
            // create new customtaskpane
            myDetail = new Detail();
            myCustomTaskPane = Globals.ThisAddIn.CustomTaskPanes.Add(myDetail, "Error List");
            myCustomTaskPane.DockPosition = Office.MsoCTPDockPosition.msoCTPDockPositionRight;
            myCustomTaskPane.Width = 380;
            myCustomTaskPane.Visible = true;
        }
    }
}

This code UserControl in CustomTaskPane:

namespace TestWordAddIn
{
    public partial class Detail : UserControl
    {
        private Word.Application wApp = Globals.ThisAddIn.Application;
        public Detail()
        {
            InitializeComponent();
        }
        private void Detail_Load(object sender, EventArgs e)
        {
        }

        private void btnChangeStatus_Click(object sender, EventArgs e)
        {
            // Change status "Open" button to "Close" button in Ribbon when click ChangeStatus button at CustomTaskPane  
        }
    }
}

This code ThisAddIn.css:

namespace TestWordAddIn
{
    public partial class ThisAddIn
    {

        private void ThisAddIn_Startup(object sender, System.EventArgs e)
        {
    
        }

        private void ThisAddIn_Shutdown(object sender, System.EventArgs e)
        {
        }

        #region VSTO generated code
        private void InternalStartup()
        {
            this.Startup += new System.EventHandler(ThisAddIn_Startup);
            this.Shutdown += new System.EventHandler(ThisAddIn_Shutdown);
        }

        #endregion
    }
}

Answer 1

Like so:

Globals.Ribbons.Ribbon1.btn.label = ...