CUnknown.NonDelegatingQueryInterface method
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Retrieves an interface pointer and increments the reference count. This method implements the INonDelegatingUnknown::NonDelegatingQueryInterface method.
Syntax
HRESULT NonDelegatingQueryInterface(
REFIID riid,
void **ppv
);
Parameters
-
riid
-
Identifier of the interface.
-
ppv
-
Address of a pointer to receive the interface.
Return value
Returns one of the HRESULT values shown in the following table.
| Return code | Description |
|---|---|
|
Success. |
|
Object does not support this interface. |
|
NULL pointer argument. |
Remarks
The CUnknown class exposes only the IUnknown interface. Override this method to expose additional interfaces. For information on how to override this method, see How to Implement IUnknown.
Requirements
| Requirement | Value |
|---|---|
| Header |
|
| Library |
|