mousewheel/horizontal scrolling

hello everybody,
since the mousewheel function does not support hscrolling, i've written my own scrollwheel handler using the osx api which works fine but it "steals" the scrollwheel from my patcher window.
is it possible to access the patchers scrollbar position, something like this:

OSStatus arrange_handleWindowEvent (EventHandlerCallRef callRef, EventRef theEvent, myMaxObject *x)
{
    if ( GetEventClass (theEvent) == kEventClassMouse)
    {
        if (GetEventKind (theEvent) == kEventMouseWheelMoved)
        {

            OSStatus status;
UInt32 modifiers;
EventMouseWheelAxis axis;
SInt32 delta;

status = GetEventParameter( theEvent, kEventParamKeyModifiers, typeUInt32,
                                     NULL, sizeof(modifiers), NULL, &modifiers );

status = GetEventParameter( theEvent, kEventParamMouseWheelAxis,
                                     typeMouseWheelAxis, NULL, sizeof(axis), NULL, &axis );

status = GetEventParameter( theEvent, kEventParamMouseWheelDelta,
                                     typeLongInteger, NULL, sizeof(delta), NULL, &delta );

if ( axis == kEventMouseWheelAxisY )
{
                if(x->mouseInside) // if mouse is inside my object move my objects scrollbar
                    myMaxObject_vScrollbarMove(x, -delta); ///this works fine
// else
// MOVE_MY_PATCHERS_VSCROLLBAR

                return noErr;
}
            else if ( axis == kEventMouseWheelAxisX )
{
                if(x->mouseInside) // if mouse is inside my object move my objects hScrollbar
                    myMaxObject_hScrollbarMove(x, -delta);//this works fine
// else
// MOVE_MY_PATCHERS_HSCROLLBAR

                return noErr;
}
            else
            {
                return noErr;
            }
        }

        else return eventNotHandledErr;
    }
    else return eventNotHandledErr;
}

thanks in advance,
cheers,
tom