I'd do a couple of things differently from how Jon did:
for i = 67 to 90
x = chr(i)
ifinlist(drivetype(x),3,4)
* Make sure the drive is ready (type 4 is either removeable
or a networkdrive)
* Put your search code hereendifendfor
The important thing is to use the CHR() of the variable in the loop.