How Can I Understand The Help Button Is Clicked In Radribbonbar

Unfortunately after 2 day search i can not find any thing but
fortunately today i can solve the problem with myself with this code

private void radRibbonBar1_Click(object sender, EventArgs e)
       {
           if (radRibbonBar1.RibbonBarElement.HelpButton.IsMouseDown)
           {
               MessageBox.Show("the help button is clik");
           }


       }

and if you want to active your help by pressing F1 you should go to the radRibbonBar event on the

private void radRibbonBar1_HelpRequested(object sender, HelpEventArgs hlpevent)
        {
            MessageBox.Show("this is help");
        }

it activate by pressing F1 for help