remove_PositionChanged method
Implementation
void remove_PositionChanged(int token) {
final hr = ptr.ref.vtable
.elementAt(16)
.cast<
Pointer<NativeFunction<HRESULT Function(Pointer, IntPtr token)>>>()
.value
.asFunction<int Function(Pointer, int token)>()(ptr.ref.lpVtbl, token);
if (FAILED(hr)) throw WindowsException(hr);
}