Hi.

The 'vanilla' modules are fairly numerous but you could check for a specfic module by using the following one-liner:

C:\>perl -e "use Tk"
Can't locate Tk.pm in @INC (@INC contains: C:/Perl/lib/MSWin32-x86-mul
+ti-thread
C:/Perl/lib C:/Perl/site/lib .) at -e line 1.
BEGIN failed--compilation aborted at -e line 1.
[download]

This informs me that I haven't installed the Tk module ( not yet at least ). If you ran that command ( or better still, put it into an array and interated over it ), you would see if it's available or not. I think japhy wrote a script to find all the installed modules on a machine.

Hope this helps.
-DK