VS 2010 Testing in Visual Basic .NET

I have written an application in Visual Basic.NET. I am now wishing to do some testing. I have had a look on Google for some resources but still do not know exactly how to create tests.

I can see that there is a Test Explorer, with a button to 'Run All' tests. The text underneath states 'Build your solution to discover all tests, Click 'Run All', to build, discover, and run all tests in your solution'

Am I correct in saying that this button will create tests for me? I have pressed it, however, I do not see any tests created.

Can I please have some help in how to create/build and then run tests in my application?

Thanks