The Remove method of the collection removes a specific picture from the collection.  The Clear method clears the ExPictures collection. The Remove/Clear method unloads the pictures being added through the Add method, but does not remove or clear any Pictures or ExtraPictures property of the Event object. The Clear method does not unload the icons being loaded using the Images method. You can use the Add method, to replace an exiting picture, when using the same key. The ShowEventPictures property indicates whether the control displays the event's pictures associated using the Pictures or ExtraPictures property.