The selection set that defines the subset of features in a selection layer.
[Visual Basic 6.0] Property DefinitionSelectionSet As ISelectionSet
[Visual Basic .NET] Public ReadOnly Property DefinitionSelectionSet As ISelectionSet
[C#] public ISelectionSet DefinitionSelectionSet {get;}
[Java] public ISelectionSet getDefinitionSelectionSet() throws IOException, AutomationException
[C++] HRESULT get_DefinitionSelectionSet( ISelectionSet** SelectionSet );