C#

#define EN_MYMSG1 (WM_USER + 200)

NMHDR nmhdr;
::ZeroMemory((LPVOID)&nmhdr, sizeof(NMHDR));

nmhdr.hwndFrom = hRichEditWnd;
nmhdr.idFrom = IDC_MYRICHEDIT;
nmhdr.code = EN_MYMSG;

::SendMessage(hWndView, WM_NOTIFY, (WPARAM)nmhdr.idFrom, (LPARAM)&nmhdr);

ON_NOTIFY(EN_MYMSG, IDC_MYRICHEDIT, OnMyMessage)

ON_NOTIFY_REFLECT(EN_MYMSG, OnMyMessage)

afx_msg void OnMyMessage(NMHDR* pnmhdr , LRESULT* pResult);

void CMyWnd::OnMyMessage(NMHDR* pnmhdr, LRESULT* pResult)
{
   if (pnmhdr->code == EN_MYMSG)
   {
       // Place your message handling code here
   }
   *pResult = 0;
}

LRESULT CALLBACK CMyWnd::WndProc(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam) 
{    
        switch(message)
        {
              case WM_NOTIFY: 
              NMHDR* pnmhdr = &(NMHDR)message.GetLParam(typeof(NMHDR));
              if (pnmhdr->code == EN_MYMSG)
              {
                  // Place your message handling code here
              }
              break;
              default: break;
        }
        return WndProcDefault(hWnd, uMsg, wParam, lParam);
}

 Timer t= new timer();
private void button_click(object ,Event )
{
    for(int i=0;i<listbox1.items.count;i++)
	 { 
	      if(i<=listbox1.items.count) 
	   {
	      listbox1.SelectedIndex =i;
             t.Tick += new  System.EventHandler(showcurrentimage);
              t.interval=10*1000;
              t.start();
          }
      }
}
  private void showcurrentimage (object , event)
 {
   picture.Load(listbox1.Selecteditems.Tostring());
   t.sop();
}

Console.WriteLine(DateTime.Now);