System.Windows.Forms.CommandBar.NotifyDropDown C# (CSharp) Method

        private void NotifyDropDown(ref Message message)
        {
            if ((this.Style == CommandBarStyle.ToolBar) || (this.Style == CommandBarStyle.TextToolBar))
            {
                NativeMethods.NMTOOLBAR nmtb = (NativeMethods.NMTOOLBAR) message.GetLParam(typeof(NativeMethods.NMTOOLBAR));
                this.TrackDropDown(nmtb.iItem);
            }
        }