title: Open File Dialog box on Clicking Link Label
body: <p>I've created a log in panel in which I've used Transparent group box(with user name text box and password text box), and used a wallpaper on background, now I've Used a link label on this log in panel by clicking on which the user can change the background wallpaper of the log in panel. </p>
  
  <p>Means when user clicks on the link label (lnklblChangeBackGround) with text "Click Here to Change Background" open dialogue box will open and user can select the Wallpaper from here and then by clicking on OK or Select the wallpaper will be assigned to background of the log in panel</p>
  
  <p>Can any one help me out that</p>
  
  <ol>
  <li>how can i open a open dialogue box by clicking on the link label</li>
  <li>how can i assign a select wallpaper to the background of my log in panel</li>
  </ol>
  
  <h2>Note: I'm Creating this using VS 2010 using C#. and it's a desktop App and i'm using winform here.</h2>