Great. Thank you. I have a short demo working: 
use Win32::AdminMisc;
@drives = Win32::AdminMisc::GetDrives( DRIVE_REMOVABLE );
foreach $drive (@drives){
    %Info = Win32::AdminMisc::GetVolumeInfo($drive);
#    print "Drive $drive label is $Info{Volume}\n";
    print "Found USBDRIVE at $drive\n" if $Info{Volume} eq 'USBDRIVE';
}

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In reply to Re^6: USB Drive Letter Assignment in Win32 by traveler
in thread USB Drive Letter Assignment in Win32 by traveler

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