Define a delegate

xpp

void myMethod()
{
    EventHandlerResult result = new EventHandlerResult();
    this.nydelegate(1, 2, result);
    
    var total = result.result();
}

delegate void myDelegate(real parm1, real parm2, EventHandlerResult result)
{
    //Must be protected, void and empty!
    //Add an EventHandlerResult to allow the subscriber to return a value
}