C#

//PsuedoCode
progressBar.Minimum = 0; 
progressBar.Maximum = mediaPlayer.PlayTime; //Or however you did this, you could work in ms instead
progressBar.Value = 0;

progressBar.Value = mediaPlayer.CurrentTime; //There should be a property like this: the current time position in the wav file

String CompleteXml="<xml version=\"1.0\"?>" + xmlBody;

XmlTextReader reader=new XmlTextReader(new System.IO.StringReader(CompleteXml));

System.DirectoryServices.AccountManagement.PrincipalServerDownException was unhandled
  Message=The server could not be contacted.
  Source=System.DirectoryServices.AccountManagement

PrincipalContext adContext = new PrincipalContext(ContextType.Domain);
            bool valid;

            using (adContext)
            {
                 valid = adContext.ValidateCredentials("studentID", "password");
            }

            Console.Write(valid);

Luc Pattyn wrote:

You may have to rethink your authentication approach; maybe the user being
logged on and running your app is sufficient; or your app should rely on its own
authentication (i.e. your own user list in the database).

using System;
using System.Drawing;
using System.Windows.Forms;

namespace YourNamespace
{
    public class CustomTabPage : TabPage
    {
        protected override void OnPaint(PaintEventArgs e)
        {
            // Do your thing before event is raised and before normal paint
            base.OnPaint(e);
            // Do your thing after event is raised and after normal paint
        }
    }
}