getID method
Implementation
int getID(Pointer<GUID> pID) => (ptr.ref.vtable + 3)
.cast<
Pointer<NativeFunction<Int32 Function(Pointer, Pointer<GUID> pID)>>>()
.value
.asFunction<
int Function(Pointer, Pointer<GUID> pID)>()(ptr.ref.lpVtbl, pID);