How to get Log messages between two tags usind cvs log command?

[Shailesh Garg]

Hi,
        There is an option of getting log message between two dates (-d) , between two revisions (-r).
Does anybody know how to get log messages between two tags on the same branch.
I want to prepare a changelog file using cvs2cl.pl utility. I want to find out what has been changed between two builds (tags) in a given branch. If I use date then cvs gives me changes from all of the branches.  I can not use revision because not every file has same revision number.

Thanks,
-Shailesh Garg
Clickmarks Inc.