I know by using test key in wihu to evaluate it, but what is the best way?

I don't think to test wether a file exits or to compare dll vertions is a good way. Are there any best way to make the test based on examing registry?

thanks.

@wihu author, hope your reply.

maybe that is a foolish question.
is every installed software has a "\version" subkey in registry?

There isn't a best way. It's different for each software, and there of course isn't always a registry key like version.
I think the best way is to some how determine the application directory and then compare against file version. That's the way I would do.

Benjamin

aha, you come

anyway 3q u very much.

You do so much for us, what can I do for you?

I think.