ADOConnection Problems!!

VB.NET
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I can't access to my access database via ado.net.
When I type in :
ADOConnection adoConnection = new ADOConnection()
the keyword ADOConnection is underlined, and can't be found!!
So, what shall I do?
to import something??
I've looked at so many examples of database accessing with ado.net in the internet, but nothing works!!
Perhaps you could give me some examples, how i could access to an access db called login, with one table 'login' and there i want to update the field username where id = 3, for example!!!
thx for your help!

pleeeeeaaaazzzzeee help meeeee!!
i need this ado connection for a project!

Start reading here:
ms-help://MS.VSCC/MS.MSDNVS/vsintro7/html/vxconDatabaseConnectionsDatabaseReferences.htm