batch file to search and locate

I am trying to write a batch file to look for a file on a drive and if its not there then create one.

Was thinking of using dir with /s to locate the file but then how do I capture weather or not I have found it..

very new to this so any help much appreciated.:confused:

Something like this perhaps

Code:

---

Dir somefile.txt /s

---

If it's there, you'll see the directory, if not, then you wont.