The event handler receives an argument of type DevExpress.Utils.ContextItemClickEventArgs containing data related to this event.
Handle the Click event to respond to a mouse click on the current ContextItem object.
For the ContextButton and CheckContextButton objects, if the ContextButtonBase.AllowHtmlText setting is enabled, and the button caption contains a hyperlink, a mouse click on the hyperlink also raises the ContextButtonBase.HyperlinkClick event.
For the RatingContextButton, a click on the button also changes its rating (see RatingContextButton.Rating), depending on the position of the mouse cursor over the button.