IExternalApplication ?? Modal

[John Allan]

Hi All,

I am creating a IExternalApplication plugin for Revit.
When I run this it locks Revit functions out. (after clicking message box)

It's as if there is a dialogue box open.
I have no problem registering events etc.. but why is my code not returning to a usable state ?

Is this normal ? am I using the correct approach ?

Thanks in advance

  
    class Example: IExternalApplication {
     public Result OnStartup(UIControlledApplication application) {
      try {
       MessageBox.Show("onstartup");
      } catch (Exception) {
       return Autodesk.Revit.UI.Result.Failed;
      }
      return Autodesk.Revit.UI.Result.Succeeded;
     }
     public Result OnShutdown(UIControlledApplication application) {
      try {
       MessageBox.Show("on shutdown");
      } catch (Exception) {
       return Autodesk.Revit.UI.Result.Failed;
      }
      return Autodesk.Revit.UI.Result.Succeeded;
     }
    }

[John Allan]

I have found the Events samples in the SDK which will be very helpful.
C:\Revit 2014 SDK\Samples\Events