/// <summary>
/// This illustrates using Sub processes within a progress bar
/// </summary>
private static void AdvancedProgressExample()
{
   // Get the progress indicator
   Progress progress = Autodesk.Navisworks.Api.Application.BeginProgress();

   double stage = 0.0;

   //------------------------------------------------------------------
   //Start the first stage
   //------------------------------------------------------------------
   progress.BeginSubOperation(0.33, "Stage 1"); //This takes up 33% of the remaining time for the total operation
   System.Threading.Thread.Sleep(1000);

   stage = DoWork(progress, stage, 0.33, 0.01);

   //End sub operation, pass true to tidy up the progress bar
   progress.EndSubOperation(true);


   //------------------------------------------------------------------
   //Begin second stage, update main percentage
   //------------------------------------------------------------------
   progress.BeginSubOperation(0.5, "Stage 2"); //This takes up 50% of the remaining time, ( 34% of total time)

   stage = DoWork(progress, stage, 0.67, 0.01);

   //End sub operation, pass true to tidy up the progress bar
   progress.EndSubOperation(true);


   //------------------------------------------------------------------
   //Final stage, update main percentage
   //------------------------------------------------------------------
   progress.BeginSubOperation(1.0, "Stage 3"); //This takes up all the remaining time. (33% of the total time

   stage = DoWork(progress, stage, 1.0, 0.01);

   //End sub operation, pass true to tidy up the progress bar
   progress.EndSubOperation(true);
   //------------------------------------------------------------------

   // End progress bar lifetime
   Autodesk.Navisworks.Api.Application.EndProgress();
}

/// <summary>
/// Does some arbitrary work
/// </summary>
/// <param name="progress">the progress object passed from the API</param>
/// <param name="stage">the current overall position</param>
/// <param name="maxValue">the max value for this chunk of work</param>
/// <param name="increment">what to increment the position by</param>
/// <returns></returns>
private static double DoWork(Progress progress, double stage, double maxValue, double increment)
{
   for (; stage < maxValue; stage += increment)
   {
      //Update progress bar
      progress.Update(stage);
      System.Threading.Thread.Sleep(100);
   }
   return stage;
}