I use Adobe Acrobat v6.01 Professional.

I am trying to set the printing preferences via VB Code, "View Adobe
PDF results" and "Ask to replace existing PDF File". And I am not able
to figure out how. Can anyone help?

I was able to do this in the previous Adobe 5.0 by setting some
registry values. In the Acrobat SDK, I can find only the programmatic
control to "Set a file name" and not any to modify the print options,