Select layer on which the operation will be performed. It is important for project files. Thanks this it is possible to recognize which entry corespondents to which layer.
// C# public void SetGroup( ITBaseObject _layer );
' VisualBasic Public Sub SetGroup( ByVal _layer As ITBaseObject )
// Oxygene public procedure SetGroup( _layer : ITBaseObject );
|_layer||ITBaseObject||layer on which the operation will be performed; it is nil then operation will be performed on main entry ([TatukGIS] section)|