This article adds menu events and shortcut key responses in CFrameWnd.

CFrameWnd

• load menu

    Create(NULL, _T("Hello MFC"),
        WS_OVERLAPPEDWINDOW,
        rectDefault, 
        NULL, 
        MAKEINTRESOURCE(IDR_MENU1)
    );

• Load Accelerator table

LoadAccelTable(MAKEINTRESOURCE(IDR_ACCELERATOR1));

• event

void CMainWindow::OnHelpAboutus()
{
    // TODO: Add your command handler code here
    OnBtnClick();
}

Accelerator

Key conflict

Remove the message mapping for MyApp.

• MyApp.cpp

BEGIN_MESSAGE_MAP(CMyApp, CWinApp)
    ////ON_COMMAND(ID_HELP, &CWinApp::OnHelp)
END_MESSAGE_MAP()

Ref

• MFC samples - General