通过

_com_ptr_t::QueryInterface

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Microsoft Specific

Calls the QueryInterface member function of IUnknown on the encapsulated interface pointer.

template<typename _InterfaceType> HRESULT QueryInterface (
   const IID& iid,
   _InterfaceType*& p 
) throw ( );
template<typename _InterfaceType> HRESULT QueryInterface (
   const IID& iid,
   _InterfaceType** p
) throw( );

Parameters

  • iid
    IID of an interface pointer.

  • p
    Raw interface pointer.

Remarks

Calls IUnknown::QueryInterface on the encapsulated interface pointer with the specified IID and returns the resulting raw interface pointer in p. This routine returns the HRESULT to indicate success or failure.

END Microsoft Specific

See Also

Reference

_com_ptr_t Class