Web Forms :: Create A Simple Class Based One Tier Architecture

I am beginner in asp.net / vb.net and I developed a web application for inventory management. here I have my insertion procedure that I entered in my code behind all the different page of my application. My problem is the following:

* I would like to put my procedure in a class that I will call on my different page * how to create this class * how to call this class on my pages

here is my procedure:

Private Sub reqinsertion (ByVal sreq As String)
         Dim con As New System.Data.Odbc.OdbcConnection ("Dsn = dshealthboard")
         Sun ocommand As System.Data.Odbc.OdbcCommand
         con.Open ()
         ocommand = New System.Data.Odbc.OdbcCommand (sreq, con)
         ocommand.ExecuteNonQuery ()
         con.Close ()
     End Sub