Dave,
I am using VB6/SP5 on W2K/SP3 and
PgAdmin 3 ver 1.0.0
PgAdmin 3 ver 1.1.Dev (just tried it today)
Problem: Text copy from VB will not paste to PgAdmin3 Query window
It works the other way around though.
Note: PgAdmin2 ver 1.6.0 has no problem in this regard
Alex