Mine

void OnAppAbout()
{
   // Construct the dialog box passing the 
   // ID of the dialog template resource
   CDialog aboutDlg(IDD_DIALOG2);

   // Create and show the dialog box
   INT_PTR nRet = -1;
   nRet = aboutDlg.DoModal();

   // Handle the return value from DoModal
   switch ( nRet )
   {
   case -1: 
      AfxMessageBox("Dialog box could not be created!");
      break;
   case IDABORT:
      AfxMessageBox("Dialog box could not be created!");
      break;
   case IDOK:
      AfxMessageBox("Dialog box could not be created!");
      break;
   case IDCANCEL:
      AfxMessageBox("Dialog box could not be created!");
      break;
   default:
      AfxMessageBox("Dialog box could be created!");
      break;
   };
}

void MFC_Tutorial_Window::OnConnectionButton()
{
	void OnAppAbout();
}