Add a new layer.
[Visual Basic 6.0] Sub Add(
ByVal layer As ILayer _
)
[Visual Basic .NET] Public Sub Add ( _ ByVal layer As ILayer _ )
[C#] public void Add ( ILayer layer );
[Java] public void add ( ILayer layer ) throws IOException, AutomationException
[C++] HRESULT Add( ILayer* layer );
Adds a sub-layer into the NALayer.