Sounds like you want: 
use Win32;
my $next_drive = Win32::GetNextAvailDrive();

[download]
If you have drives "A:" through "D:", this returns "E:".
_____________________________________________________
Jeff japhy Pinyan, P.L., P.M., P.O.D, X.S.: Perl, regex, and perl hacker
How can we ever be the sold short or the cheated, we who for every service have long ago been overpaid? ~~ Meister Eckhart

In reply to Re: randomly choosing an alphabetic letter by japhy
in thread randomly choosing an alphabetic letter by Anonymous Monk

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