ARUP.IssueTracker.Revit.Entry.AppIssueTracker.Focus C# (CSharp) Method

    public void Focus()
    {
      try
      {
        if (RvtWindow == null) return;
        RvtWindow.Activate();
        RvtWindow.WindowState = WindowState.Normal;
      }
      catch (Exception ex)
      {
        MessageBox.Show(ex.ToString());
      }

    }
  }

        /// <summary>
        /// Main Command Entry Point
        /// </summary>
        /// <param name="commandData"></param>
        /// <param name="message"></param>
        /// <param name="elements"></param>
        /// <returns></returns>
        public Result Execute(ExternalCommandData commandData, ref string message, ElementSet elements)
        {
            try
            {
#if REVIT2014
                string versionNumber = "2014";
#elif REVIT2015
                string versionNumber = "2015";
#elif REVIT2016
                string versionNumber = "2016";
#elif REVIT2017
                string versionNumber = "2017";
#elif REVIT2018
                string versionNumber = "2018";
#elif REVIT2019
                string versionNumber = "2019";
#endif

                // Version
                if (!commandData.Application.Application.VersionName.Contains(versionNumber))
                {
                    using (TaskDialog td = new TaskDialog("Cannot Continue"))
                    {
                        td.TitleAutoPrefix = false;
                        td.MainInstruction = "Incompatible Revit Version";
                        td.MainContent     = string.Format("This Add-In was built for Revit {0}, please find the Arup Issue Tracker group in Yammer for assistance...", versionNumber);
                        td.Show();
                    }
                    return(Result.Cancelled);
                }

                // Form Running?
                if (_isRunning && _appIssueTracker != null && _appIssueTracker.RvtWindow.IsLoaded)
                {
                    _appIssueTracker.Focus();
                    return(Result.Succeeded);
                }

                _isRunning = true;

                ThisCmd          = this;
                _appIssueTracker = new AppIssueTracker();
                _appIssueTracker.ShowForm(commandData.Application);

                // register a document closed event
                commandData.Application.Application.DocumentClosed += Application_DocumentClosed;

                return(Result.Succeeded);
            }
            catch (Exception e)
            {
                message = e.Message;
                return(Result.Failed);
            }
        }