queryInterface method

int queryInterface(Pointer<GUID> riid, Pointer<Pointer<NativeType>> ppvObject)

Queries a COM object for a pointer to one of its interface; identifying the interface by a reference to its interface identifier (IID).

If the COM object implements the interface, then it returns a pointer to that interface after calling addRef on it.

Implementation

int queryInterface(Pointer<GUID> riid, Pointer<Pointer> ppvObject) =>
    (ptr.ref.vtable + 0)
        .cast<
          Pointer<
            NativeFunction<
              Int32 Function(
                Pointer,
                Pointer<GUID> riid,
                Pointer<Pointer> ppvObject,
              )
            >
          >
        >()
        .value
        .asFunction<
          int Function(
            Pointer,
            Pointer<GUID> riid,
            Pointer<Pointer> ppvObject,
          )
        >()(ptr.ref.lpVtbl, riid, ppvObject);