private System.ComponentModel.BackgroundWorker spawnBrowserBackgroundWorker;

void Initialize ( )

{

this.spawnBrowserBackgroundWorker = new System.ComponentModel.BackgroundWorker();

this.spawnBrowserBackgroundWorker.DoWork += new System.ComponentModel.DoWorkEventHandler(this.spawnBrowserBackgroundWorker_DoWork);

}

/// <summary>

/// BackgroundWorker.DoWork event handler.

/// Just spawn a process to handle the URL based on the system's file association.

/// </summary>

private void spawnBrowserBackgroundWorker_DoWork ( object sender, DoWorkEventArgs e )

{

String url = e.Argument as String;

if (url != null)

{

Process process = new Process();

process.StartInfo.FileName = "rundll32.exe";

process.StartInfo.Arguments = "url.dll,FileProtocolHandler " + url;

process.StartInfo.UseShellExecute = true;

process.Start();

}

}

public void SpawnURL ( string url )

{

//...

// Asynchronously spawn a browser as this may take

// several seconds.

// Use BackgroundWorker to avoid queueing with the thread pool

// and avoid delay with Control.BeginInvoke.

spawnBrowserBackgroundWorker.RunWorkerAsync(url);

}