added new project for party mode challenge

VocaluxeLib/PartyModes/CPartyMode.cs

@@ -12,6 +12,7 @@ namespace Vocaluxe.PartyModes
         protected ScreenSongOptions _ScreenSongOptions;
         protected Dictionary<string, CMenuParty> _Screens;
         protected string _Folder;
+        protected Delegate _Callback;
 
         public CPartyMode()
         {
@@ -38,6 +39,11 @@ namespace Vocaluxe.PartyModes
             _Screens.Add(ScreenName, Screen);
         }
 
+        public void SetPartyModeCallback(Delegate Callback)
+        {
+            _Callback = Callback;
+        }
+
         public virtual CMenuParty GetNextPartyScreen()
         {
             return null;

VocaluxeLib/PartyModes/IPartyMode.cs

@@ -54,6 +54,7 @@ namespace Vocaluxe.PartyModes
         bool Init(string Folder);
         void Initialize(Basic Base);
         void AddScreen(CMenuParty Screen, string ScreenName);
+        void SetPartyModeCallback(Delegate Callback);
 
         CMenuParty GetNextPartyScreen();
         EScreens GetStartScreen();