How to change this to a stored procedure in appliaction

[Mikejds2098]

Hi I would like to make this more secure by running the sql command as a stored procedure any help appreciated

Dim Myadapter1 As New MySqlDataAdapter
        Dim sqlquary1 = "SELECT * FROM mjbb_users WHERE username='" & UsernameTextBox.Text & "'AND password='" & RadTextBox2.Text & "';"
        Dim command1 As New MySqlCommand
        command1.Connection = MySqlConnection
        command1.CommandText = sqlquary1
        Myadapter1.SelectCommand = command1
        Dim mydata1 As MySqlDataReader
        Try
            mydata1 = command1.ExecuteReader

            If mydata1.HasRows = 0 Then

I am using vb.net vs2013 and mySQL db

thanks