using ExcelDna.Integration.CustomUI; using RhSolutions.AddIn; using System.Reflection; using System.Runtime.InteropServices; using System.Windows.Forms; namespace RhSolutions.Controllers; [ComVisible(true)] public class RibbonController : ExcelRibbon { private static IRibbonUI ribbonUi; public override string GetCustomUI(string RibbonID) { return @"