Multi-threading is not possible in VBA. A called back function is supported
(e.g., a TimerProc for the SetTimer API function) using the AddressOf
operator, but a function in VBA cannot call a called back function.


--
Cordially,
Chip Pearson
Microsoft MVP - Excel, 10 Years
Pearson Software Consulting
www.cpearson.com
(email on the web site)


"hamishd" wrote in message
...
Hi,

Is multi-threading and call-back functions possible in VBA? Or even
VB?

Thanks