Thanks Christophe!<br><br>I understand the reasons (I was totally forgetting performance!).<br><br>Anyway, I&#39;ve found myself in very similar situations (needing events from submachines to the top machine) and I&#39;ve decided to &quot;standarize&quot; a ugly pointer solution just to make it nicer... ;-)<br>

<br>It works great and I think it will be easy to adapt to the future variadic template you are plannig to add.<br><br>Thanks for the MSM Christophe!<br><br><br>Albert<br><br><br><br>