How to click the ribbon popup button from coding?

Hi there,

We use a ribbon popupbutton in our applications and a user control is didsplayed when users clicking the button, which works perfectly.

        private void PopupButton_PopupOpening(object sender, ActiproSoftware.Windows.CancelRoutedEventArgs e)
        {
            PopupButton popupOwner = (PopupButton)sender;
            popupOwner.PopupContent = UCWorkCode.CurrentWorkCodeUserControl;

            
        }

 Now we need to popup the user control from coding. Anyway to archieve that? We tried the sendkey with no luck.

Thanks in advance.

Roger