Gets or sets a callback that indicates where a ContextMenu should be placed on the screen.
Assembly: PresentationFramework (in PresentationFramework.dll)
The CustomPopupPlacementCallback delegate returns an array of possible points that are defined with respect to the PlacementTarget. When the context menu is displayed, a point is chosen that maximizes the amount of the ToolTip window that is visible.
Available since 3.0