Instructs the object to initialize itself using the properties available in the property bag, and to notify the provided error log object when errors occur.
HRESULT retVal = object.Load(pPropBag, pErrorLog);
The address of the caller's property bag, through which the object can read properties. This cannot be NULL.
The address of the caller's error log, in which the object stores any errors that occur during initialization. This can be NULL; in which case, the caller does not receive errors.
All property loading must take place in the IPersistPropertyBag::Load function call, because the object cannot hold the IPropertyBag pointer.
E_NOTIMPL is not a valid return code, because any object that implements this interface must support the entire functionality of the interface.