The current family type.
Assembly: RevitAPI (in RevitAPI.dll) Version: 2015.0.0.0 (2015.0.0.0)
Only the current family type is editable using the methods in FamilyManager . If you want to modify the properties of any family type, it must be set to be the current type first. This value will be a null reference ( Nothing in Visual Basic) if there is no type in the family. In order to modify parameter values, you will need to create one using NewType(String) .