Add a definition to be reused by instances. Adding a definition type will change how the instances are created. When asked to create a definition, the library object will look for a corresponding type object. If one is found, it will create an instance of geometry stored in the type object. If it is not found, the library will look for a list of geometry objects stored as definition, and will copy and transform these to create an instance.

public void AddDefinitionType(
	string id,
	ElementId typeId
)

Public Sub AddDefinitionType ( _
	id As String, _
	typeId As ElementId _
)

public:
void AddDefinitionType(
	String^ id, 
	ElementId^ typeId
)