Hi Nadya,

*Therefore I have to find, if file is already in use, and if it's, is it *exclusive access or non-exclusive. If file is used exclusevely, does it mean, *that it could not be opened even in shared mode on another computer?

- You couldn't open this database.

*If it's true, each use function should be surrounded with quite long piece of *code...

- I had written function with all this long code for open database. But good rule - don't give anybody open exclusively like administrator. You can use password access for it. I think this is administratives' problem.

For check can I open it or no - I used next:
- turn off error tracing
- try open datebase by exclusively
- if it not open - somebody has opened it

For checking if somebody had opened it - one way in your application (if your customer have not advanced user) - make small database with flags that some databases have been opened. And you can check it in your applications. You must be cheif.