Property :: isBasetypeProperty - Is property member of the base type
The property returns for properties of weak-typed instances, whether the property is part of the common base type (true) or not (false). For top-level properties such as extents, the it returns false; for sub-properties of well-typed instances it returns true,always.
The property throws an exception, when the property handle is not valid.
Return value: Success ( bool )
The value is true when the function was executed successfully. Otherwise the value is set to false.