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What is the best way to determin whether a software is installed?


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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?


@wihu author, hope your reply.

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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.


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