SetMasterVolume method
Implementation
int SetMasterVolume(double fLevel, Pointer<GUID> EventContext) =>
ptr.ref.vtable
.elementAt(3)
.cast<
Pointer<
NativeFunction<
Int32 Function(Pointer, Float fLevel,
Pointer<GUID> EventContext)>>>()
.value
.asFunction<
int Function(
Pointer, double fLevel, Pointer<GUID> EventContext)>()(
ptr.ref.lpVtbl, fLevel, EventContext);