addSeconds method
Implementation
void addSeconds(int seconds) {
final hr = ptr.ref.vtable
.elementAt(85)
.cast<
Pointer<NativeFunction<HRESULT Function(Pointer, Int32 seconds)>>>()
.value
.asFunction<
int Function(Pointer, int seconds)>()(ptr.ref.lpVtbl, seconds);
if (FAILED(hr)) throw WindowsException(hr);
}