Spork 2.0 may be on to something. I use VB6 on XP with no known issues (I am not a Guru), and attempted to replicate your issue to no avail.
Maybe an update to VB6?
You could try a system restore to a point that pre-dates your issue.
[SIZE=\"1\"]E6400 @ 3.4 , Noctua 120
7900GT @ 670/1680 , VF900
2 x 1GB Patriot 6400 @ 425
WD SATA 250GB
Neo HE 550
P180 / G15 / MX1000[/SIZE]