The first article is for visual basic (the language), but is easily
adaptable to VBA.
http://support.microsoft.com/kb/291573/en-us
How To Use Visual Basic to List Active Logical Drives


This is a general sample file for the Filesystem object found in the
Scripting runtime and available for your use by creating a reference to it
in the VBA in tools=references or by using late binding:
http://support.microsoft.com/kb/190882/en-us
SAMPLE: FSOSAMP.EXE Application Uses the FileSystem Object

--
Regards,
Tom Ogilvy
"KevinGPO" wrote in message
...
What is the best way to test whether a drive exists? Sometimes the
Dir("C:")
returns "" even when the drive is completely valid.

Maybe I should do ChDrive then test Err.Number. Then ChDir then test
Err.Number???


"KevinGPO" wrote in message
...
When I call the function Dir("Q:\") and Q:\ is a network mapped drive
does
it fail (return "") if it does not receive a reply within a certain
time-limit? The reason why I ask is because the update response from a
network mapped drive is very slow here. If the slow response causes
Dir("Q:\") function to return "" then how can I make it longer time-out?