IDC_MAINFRAME_ADDRESSBOOK_DEL 40 MainAddressBookDlg.cpp DDX_Control(pDX, IDC_MAINFRAME_ADDRESSBOOK_DEL, m_button_del); IDC_MAINFRAME_ADDRESSBOOK_DEL 48 MainAddressBookDlg.cpp ON_BN_CLICKED(IDC_MAINFRAME_ADDRESSBOOK_DEL, OnDel)