Sort code from a class

good afternoon
lords programmers if someone can guide me have this code that search provider abut rut if you do not shoot me an fuciona modalextender
1 question as I order put this code in a class and call it from my form ingresocotizacion.aspx
2 .as I show an mesaje whether or not to show the line of modal else
Protected Sub Button4_Click (sender As Object, e As System.EventArgs) Handles Button4.Click         Dim cmd As New MySqlCommand         Dim data As vproveedor New         Try             conn.Open ()             cmd = New MySqlCommand ("Busquedalikeproveedor")             cmd.commandtype = CommandType. ...