Retrieves an interface and increments the reference count.

HRESULT NonDelegatingQueryInterface(
REFIID riid,
void **ppv);


  • riid
    Reference identifier.
  • ppv
    Pointer to the interface.

Return Values

Returns E_POINTER if ppv is invalid. Returns NOERROR if the query is successful or E_NOINTERFACE if it is not.


This member function provides an implementation of the INonDelegatingUnknown::NonDelegatingQueryInterface method. By default it passes out references to IDirectDrawSurface and then calls the CUnknown::NonDelegatingQueryInterface member function for base class interface references. Override this class to return interfaces added in the derived class.

 Last updated on Tuesday, July 13, 2004

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