Microsoft.Windows.Controls.Ribbon.RibbonTextBox.OnKeyTipAccessed C# (CSharp) Method

        protected virtual void OnKeyTipAccessed(KeyTipAccessedEventArgs e)
        {
            if (e.OriginalSource == this)
            {
                // Open Group DropDown and focus self.
                RibbonHelper.OpenParentRibbonGroupDropDownSync(this, TemplateApplied);
                Focus();
                e.Handled = true;
            }
        }