WxWidgets dynamic event handler resize

In WxWidgets when using a Dynamic event table versus a static one, with capturing a resize event. with a static table I use

EVT_SIZE(MyFrame::OnSize)

and for reference for a menu item I use

EVT_MENU(wxID_ABOUT, MyFrame::OnAbout)
//for the dynamic
frame->Connect( wxID_ABOUT,
    wxEVT_COMMAND_MENU_SELECTED,
    wxCommandEventHandler(MyFrame::OnAbout) );

ok so with the menu in the dynamic setup wxEVT_COMMAND_MENU_SELECTED is used while in the static setup I use EVT_MENU. so my question is what do I use instead of EVT_SIZE? I'm also wondering what the differance is between the two EVT_MENU and wxEVT_COMMAND_MENU_SELECTED. One more what type of thing are they in c++? enums