Create threads to update GUI

Source/Program/Program.cs

@@ -65,6 +65,7 @@ namespace ProgramLib
       internal EventManager _eventManager = new EventManager();
       internal FileAndFolderManager _fileAndFolderManager;
       internal IConfigurationFile _programConfig { get; private set; }
+      internal bool _isUutPwrOn = false;
 
       /// <summary>
 		/// Create an instance of this class. Only one instance is allowed
@@ -261,6 +262,11 @@ namespace ProgramLib
          }
       }
 
+      /// <summary>
+      /// Save error message originated from other threads
+      /// </summary>
+      /// <param name=""></param>
+      /// <returns></returns>
       internal void SetFatalErrorMsgFromThread(string errorMsg)
       {
          lock(_fatalErrorMsgFromThreadSyncObj)