Context popups are popup windows opened in a context fashion. You can open any popup window in a context fashion using the OpenInContext(NPopupWindow popupWindow, NNode targetNode, NPointF screenPos) static method of the NPopupWindow class, where:
popupWindow - the popup window to open in context fashion
targetNode - the node for which the context popup is opened
screenPos - the position on screen at which to open a popup window
