getCount method
Implementation
int getCount(Pointer<Uint32> pCount) => (ptr.ref.vtable + 4)
.cast<
Pointer<NativeFunction<Int32 Function(Pointer, Pointer<Uint32> pCount)>>
>()
.value
.asFunction<
int Function(Pointer, Pointer<Uint32> pCount)
>()(ptr.ref.lpVtbl, pCount);