Can I run client programs written by VB 6.0 in Windows Vista machine ?
In theory, yes ....
<http://msdn2.microsoft.com/en-us/vbrun/ms788708.aspx>
You _can_ get trouble with some DCOM components, though.
It's always a good idea to test the application in Vista
(and other versions of Windows) before You distribute the program.
--
Snutten