Get Window handle (IntPtr) from Selenium webdriver's current window GUID

You could get the window handle using Process.GetProcesses:

using (FirefoxDriver driver = new FirefoxDriver()){    driver.Navigate().GoToUrl(url);    string title = String.Format("{0} - Mozilla Firefox", driver.Title);    var process = Process.GetProcesses()        .FirstOrDefault(x => x.MainWindowTitle == title);    if (process != null)    {        var screenCapture = new ScreenCapture();        var image = screenCapture.CaptureWindow(process.MainWindowHandle);        // ...    }}

This of course assumes that you have a single browser instance with that specific title.

Just and idea for hack. You may use Reflection methods to get process of firefox instance. First declare FirefoxDriverEx class inherited from FirefoxDriver - to access protected Binary property which encapsulates Process instance:

 class FirefoxDriverEx : FirefoxDriver {        public Process GetFirefoxProcess() {            var fi = typeof(FirefoxBinary).GetField("process", BindingFlags.NonPublic | BindingFlags.Instance);            return fi.GetValue(this.Binary) as Process;        }    }

Than you may get process instance for access to MainWindowHandle property

using (var driver = new FirefoxDriverEx()) {            driver.Navigate().GoToUrl(url);            var process = driver.GetFirefoxProcess();            if (process != null) {                var screenCapture = new ScreenCapture();                var image = screenCapture.CaptureWindow(process.MainWindowHandle);                // ...            }        }

Out of box, selenium does not expose driver process id or Browser hwnd but it is possible.Below is the logic to get hwnd

• When driver is initialized, get the url for hub and extract the port number
• From port number, find the process id which is using this port for listening, ie. PID of driver
• After navigation, from all instances of iexplore find the parent PID matches the pid of driver, i.e browser pid.
• Get the Hwnd of browser pidonce browser hwnd is found , you can use win32 api to bring selenium to foreground.

its not possible to post full code here, the full working solution (C#) to bring browser in front is on my blog

http://www.pixytech.com/rajnish/2016/09/selenium-webdriver-get-browser-hwnd/