>I've been using the following for years (since the DOS days...)
>
>PARAMETERS filename
>fh = FOPEN(filename, 12)
>IF fh > 0
> =FCLOSE(fh)
> RETURN (ok to use exclusively...)
>ELSE
> RETURN (file is in use, try again later...)
>ENDIF
>
Rick & Barbara,

Thanks for your answers. Let me give your a little bit history of the problem:

I have this line of code:
USE (lcTableName) ALIAS (lcAlias) AGAIN NOUPDATE SHARED IN 0

It gave me an error: 'file access is denied'...

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