I am a little confused here.

I was under the impression that before you can use an interface (and you
can't instantiate an interface), you have to implement all the methods.

But I am trying to set up a Generic DataBase class and this seems to work.
I am not instantiating the IDbConnection interface and am not defining any
of the methods (ChangeDatabase, Close, CreateCommand, Open).

In the following I am defining dbConn as an IDbConnection and am passing it
back as an IDbConnection type:
********************************************************************
Sub LoadGrid3()
 Dim dbConn As IDbConnection = _
      GetConnection("Persist Security Info=False;Data Source=AW;Initial
Catalog=Inter")
 Dim dbCmd As SqlCommand = New SqlCommand("GetUsers", dbConn)
 dbCmd.CommandType = CommandType.StoredProcedure

 dbCmd.Parameters.Add("@UserID",SqlDBType.Int).value = 1
 dbConn.Open()

 DataGrid1.DataSource = dbCmd.ExecuteReader
 DataGrid1.DataBind()
End Sub

Function GetConnection(ConnectString As String) As IDbConnection
 Dim cnn As New SqlConnection(ConnectString)
 return cnn
End Function
**************************************************************************

Why does this work????

Thanks,

Tom