Re: test application in VB
You would test your app by installing it on a few systems that have different OS platforms and versions. For ex. You have an extra system with a clean fresh install of Windows 98 SE and you install your app and it installs sucessfully. Then you test its performance and operations if they are acceptable. If so then its compatible on that OS. Next install it on other OS' andversions noting the ones where it fails or contains bugs.
Another way is to purchase some testing software that automates the usage of your app or software that evaluates your code for optimizations and issues.
Moved :)
Re: test application in VB
There are tons of QA related utilities out there. It all depends on your budget and necessity.
Personally, I don't believe in any ofit - best test is done by the users community or specially dedicated QA pesonal that will take your app and will turn it up side down to find what's not working.
Also, if you build your app with "heavy" user's involvment (this includes workshops, etc) then you will ahve much better chance to "go live" in almost no time.
But different companies have different approaches ... I should say each company has unique approach I guess.
ps, here are some results from Google search: QA related software.