[2005] Checking Net Connection, Does vb have a database?,minor question about objects

[Icyculyr Fr0st]

Ok I have a few questions i'd like to know, if anyone can help me that'd be great

Question 1: How do I check to see if the user has an internet connection?
And basically setup an event so

For a game

They click login, if they're not online, it pops up, with a MessageBox and says "You cannot login without an internet connection"

If they login and are connected, and then during the game, if you disconnect from the internet, it will return you to the main menu,

Can anyone tell me how thats done?

Question 2: Does vb have a built in database? or something?
I've seen a few threads that make it look like it does, if so does anyone know a tutorial (good or bad) for using its database?

And would it be possible to upload that database information to a mysql database? or something?

If it doesn't, what can I use as a database with vb (Microsoft Access?)

Question 3:

I declare my objects / structures like this

Structure db
        Public e As EventArgs 'if I dont have some normal variable, it gives an error saying it hasn't had a variable initilized or something, why is this?
        Shared pass(Integer.MaxValue) As String
        Shared user(Integer.MaxValue) As String
    End Structure

Thanks in advance