how to use orcale in vb dotnet

hello i want to use orcale in a project tell me how to use orcale in vb dot net
thanks wit regards

VB Code:

Try
            strconn = "Provider=OraOLEDB.Oracle;Persist Security Info=False;User ID=APPLOGON;Password=APPPASSWORD; Data Sour" & _
                            "ce=" & DropDowndb.SelectedItem.Text & ";OLEDB.NET=True;" & ";Extended Properties="""""
            conn = New OleDb.OleDbConnection(strconn)
            conn.Open()
 
        Catch ex As Exception
            lblLoginError.Text = "Database " & DropDowndb.SelectedItem.Text & " is not working - Contact IT " & Err.Description
            conn.Close()
            Exit Sub
        End Try
        conn.Close()