File is being used by another process

Question

I have a program that roughly does this:

1. open a file to read from it.
2. close the file
3. Start a filewatcher to watch for changes in the file.

Answer 1

You can use this MS utility openfiles to obtain list of opened files and understand who has opened the file.

openfiles /query

Also it allow to disconnect files opened by network users.

openfiles /disconnect /id XXXX

If you want use it for local PC you should set Maintain Objects List global flag:

openfiles /local on

Follow the link to get more details.