One interesting thing is the ability to add you own comments into Visual Studio Intellisense. So you can make your own written functions and classes self-explanatory. To do so, you must type the comment symbol three times the line above your function.
Once done, Visual Studio will automatically add an XML documentation :
''' <summary>
''' This function returns a hello to your name
''' </summary>
''' <param name="Name">Your Name</param>
''' <returns></returns>
''' <remarks></remarks>
Public Function Test(Name As String) As String
Return "Hello " & Name
End Function
After that, if you type in your Test function somewhere in your code, this little help will show up :