Updated Wiki: Documentation

/// <summary>
/// Button click handler to initiate scanning. This should be ted to the click event for a button in your application
/// </summary>
private void ApplicationBarIconCaptureButton_Click(object sender, EventArgs e)
{
	try
	{
		WP7BarcodeManager.ScanMode = com.google.zxing.BarcodeFormat.UPC_EAN;

		if (bBypassCamera == true) //Use Barcode Sample Chooser "Task" if bypass camera setting is active (Emulator/demo mode)
		{
			NavigationService.Navigating += new NavigatingCancelEventHandler(NavigationService_Navigating);
			NavigationService.Navigate(BarcodeSampleItemManager.BarcodeChooserURI); //Navigate to barcode chooser page located in WP7_Barcode_Library.WP7Code
		}
		else //Use BarcodeManager to start camera and scan image
		{
			WP7BarcodeManager.ScanBarcode(BarcodeResults_Finished); //Provide callback method
		}
	}
	catch (Exception ex)
	{
		Debug.WriteLine("Error processing image.", ex);
	}
}

/// <summary>
/// Callback method that processes results returned by the WP7BarcodeManager. Results are also stored at WP7BarcodeManager.LastCaptureResults.
/// </summary>
/// <param name="BCResults">Object that holds all the results of processing the barcode. Results are also stored at WP7BarcodeManager.LastCaptureResults.</param>
public void BarcodeResults_Finished(BarcodeCaptureResult BCResults)
{
	try
	{
		if (WP7BarcodeManager.LastCaptureResults.BarcodeImage != null)
		{
			imgCapture.Source = WP7BarcodeManager.LastCaptureResults.BarcodeImage; //Display image
		}
		else
		{
			//No image captured
		}
		if (BCResults.Result == BarcodeResult.Success)
		{
			txtResult.Text = BCResults.BarcodeText; //Use results
		}
		else
		{
			Debug.WriteLine(BCResults.ErrorMessage);
		}
	}
	catch (Exception ex)
	{
		Debug.WriteLine(String.Format("Barcode Processing Error: {0}", ex.Message));
	}
}


//Extra code required only if you are bypassing the camera
private void NavigationService_Navigating(object sender, NavigatingCancelEventArgs e)
{
	if (e.NavigationMode == NavigationMode.Back && NavigationService.CurrentSource == BarcodeSampleItemManager.BarcodeChooserURI)
	{
		NavigationContext.QueryString["LOADSAMPLE"] = "TRUE";//Set flag to load sample
	}
	else
	{
		NavigationContext.QueryString.Remove("LOADSAMPLE");
	}
}
private void PhoneApplicationPage_Loaded(object sender, RoutedEventArgs e)
{
	//Detect if page is navigating back from BarcodeSampleChooser and start processing
	try
	{
		string strFlag;
		if (NavigationContext.QueryString.TryGetValue("LOADSAMPLE", out strFlag))
		{
			if (BarcodeSampleItemManager.SelectedItem != null)
			{
				WP7BarcodeManager.ScanBarcode(BarcodeSampleItemManager.SelectedItem.FileURI, new Action<BarcodeCaptureResult>(this.BarcodeResults_Finished));
			}
			else
			{
				MessageBox.Show("Error: Sample chooser canceled");
			}
			NavigationContext.QueryString.Remove("LOADSAMPLE");
		}
	}
	catch (Exception ex)
	{
		Debug.WriteLine("Error processing sample image.", ex);
	}
}