Hi Nick,
>Problem is that Main is blocked until Worker1 has finished the method.
>Any idea how to call a method via COM without waiting for the result?
I think it is just a problem of calling and receiving notification.
If you just call a method in the COM, you don't get asynch processing.
If you start the method in the COM through a timer checking a property
set via main, you get asynch processing but without a callback you have to
periodically check all workers (see poolmanager...)

There are some ways described in the download section (probably working)
but there is also the very old DDE way to control other processes.

DDE is NOT current technology, but OTOH it has (documented and working!)
callback functions after asynch processing.

Boning up in yesterdays technology might be really useful here.

HTH

thomas