Yes, it's called the SAS - secure attention key sequence. Under NT/2K/XP the OS traps this -- you are not able to get access to this key sequence without writing a GINA dll, something which is extremely painful and difficult to do, even for experienced C & Win32 developers.
Under 95/98/ME, it is possible to do this via an API call. I don't remember what it is, but a search in the VB6 forum will turn it up.
Chip H.
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