text: #pragma once
  #include "XWnd.h"
  #include "resource.h"
  #include "SineWnd.h"
  #include "MP3Player.h"
  #include "MovPlayer.h"
  
  class CMainWnd : public CXWnd
  {
  public:
      CMainWnd();
      virtual ~CMainWnd();
  
      virtual ATOM Register();
      BOOL Create();
  protected:
      virtual void OnSize(HWND hwnd, UINT state, int cx, int cy);
  private:
      CSineWnd m_wndSine;
      CMP3Player m_wndMP3Player;
      CMovPlayer m_wndMovPlayer;
  };
  
  