show method
Implementation
void show(Rect selection) {
final hr = ptr.ref.vtable
.elementAt(15)
.cast<
Pointer<
NativeFunction<HRESULT Function(Pointer, Rect selection)>>>()
.value
.asFunction<
int Function(Pointer, Rect selection)>()(ptr.ref.lpVtbl, selection);
if (FAILED(hr)) throw WindowsException(hr);
}