I want to detect the cd ROM drive letter from the batch file and POINT it into my file which is on a cd.I want to access the file on a cd in different systems with different cd drive letters and access my file by means of a batch file.please help me in this regardThis code search your file in all the drive letters for devices (DISK, CD-ROM USB pendrive, diskette, ...). You can remove the letter A, B (maybe C) if you are sure that the CD isn't in this drives.

Code: [Select]@echo off
set DRIVE=
for %%D in (a b c d e f g h i j k l m n o p q r s t u v w X y z) do vol %%D: >NUL 2>NUL && if exist %%D:\PathTo\MyFile.txt set DRIVE=%%D

if not defined DRIVE echo I can't find the file && goto END

type %DRIVE%:\PathTo\MyFile.txt

:END
You must change the "PathTo\MyFile.txt" for yours.
You could have a problem if exist ANOTHER path/file in other drive with the same name "PathTo\MyFile.txt", it will work with the last unit found.

P.S. You dont posted your OS, this code works for W2000 and laters.