getChannelVolume method
Implementation
int getChannelVolume(int dwIndex, Pointer<Float> pfLevel) =>
(ptr.ref.vtable + 5)
.cast<
Pointer<
NativeFunction<
Int32 Function(
Pointer, Uint32 dwIndex, Pointer<Float> pfLevel)>>>()
.value
.asFunction<
int Function(Pointer, int dwIndex,
Pointer<Float> pfLevel)>()(ptr.ref.lpVtbl, dwIndex, pfLevel);