The Z-index of a reordered mark. For ArtPage.markReordered events, this will be the new Z-index of the mark that was reordered. For other events, it will be the Z-index of the mark which is most directly related to the event and events that affect multiple marks will not provide a value for this property. The MarkCollection object will never provide a value for this property because the marks in a MarkCollection have no particular order.

var zIndex : Integer;

var resultVar = instanceOfMarkEventArgs.zIndex;