How many days the lock is valid in WinCVS?

[Abhinav Korlakunta]

Hi,
Recently I noticed this that, If I keep the files locked for long
times (I am not sure how long it is - more than a week), the CVS is
disabling the lock on it even though I edited that file. Other users
can reserve that file without my notice.
Please let me know how to overcome it.

Thanks,
Abhinav.