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IDirectInputEffectDriver::QueryInterface method (dinputd.h)

  • Article

The IDirectInputEffectDriver::QueryInterface method determines whether the DirectInputEffectDriver object supports a particular COM interface. If it does, the system increases the reference count for the object by 1, and the application can begin using that interface immediately. This method is part of the IUnknown interface inherited by DirectInputEffectDriver.

Syntax

HRESULT QueryInterface(
  REFIID riid,
  LPVOID *ppvObj
);

Parameters

riid

Reference identifier of the interface being requested.

ppvObj

Address of a pointer to be filled with the interface pointer if the query is successful.

Return value

Returns S_OK if the interface is supported; otherwise, returns E_NOINTERFACE.

Remarks

When the application no longer needs to use the interface retrieved by a call to this method, it must call the Release method for that interface to free it.

Requirements

Requirement Value
Target Platform Desktop
Header dinputd.h (include Dinputd.h)