EVT_MENU(MAINMENU_HELP_ABOUT, MainFrame::OnAbout)
EVT_MENU(MAINMENU_HELP_CONTENTS, MainFrame::OnHelpContents)
EVT_MENU(MAINMENU_HELP_TOPICS, MainFrame::OnHelpTopics)
EVT_MENU(MAINMENU_HELP_ABOUT, MainFrame::OnAbout)
EVT_MENU(MAINMENU_HELP_CONTENTS, MainFrame::OnHelpContents)
EVT_MENU(MAINMENU_HELP_TOPICS, MainFrame::OnHelpTopics)