John S wrote:
> Have you a VB6 sample how to set up a security ?

VB6 calls CoInitializeSecurity very early in the process startup. Try this:

Run dcomcnfg, then open Component Services > Computers > My Computer
(Properties) > Default Properties tab, change the default
impersonational level to "Impersonate"

Now re-run your VB application, the default CoInitializeSecurity call in
VB should allow you to create the VirtualServer.Application class