How to set input on textbox on another app which is chrome (or comodo dragon) browser?

Process[] Processes = Process.GetProcessesByName("dragon");

            foreach (Process p in Processes)
            {
                ShowWindow(p.MainWindowHandle, SW_RESTORE);
            }



            Processes = Processes.Where(p => p.MainWindowHandle != IntPtr.Zero).ToArray();

            if (Processes.Length == 0)
            {
                ProcessStartInfo prs = new ProcessStartInfo("dragon.exe");
                prs.Arguments = "http://translate.google.com" + " --new-window";
                prs.WindowStyle = ProcessWindowStyle.Normal;
                Process p = Process.Start(prs);
                //p.WaitForInputIdle(3000);
            }


            Processes = Process.GetProcessesByName("dragon");

            foreach (Process p in Processes)
            {
                ShowWindow(p.MainWindowHandle, SW_MINIMIZE);
            }

            foreach (Process p in Processes)
            {
                ShowWindow(p.MainWindowHandle, SW_RESTORE);
                SetWindowPos(p.MainWindowHandle, HWND_TOPMOST, 0, 0, 0, 0, SWP_SHOWWINDOW | SWP_NOSIZE | SWP_NOMOVE);
                BringWindowToTop(p.MainWindowHandle);
                SetForegroundWindow(p.MainWindowHandle);
            }

            foreach (Process p in Processes)
            {
                SetWindowPos(p.MainWindowHandle, HWND_TOP, 0, 0, 0, 0, SWP_SHOWWINDOW | SWP_NOSIZE | SWP_NOMOVE);
                SetWindowPos(p.MainWindowHandle, HWND_NOTOPMOST, 0, 0, 0, 0, SWP_SHOWWINDOW | SWP_NOSIZE | SWP_NOMOVE);
            }

            foreach (Process p in Processes)
            {
                ShowWindow(p.MainWindowHandle, SW_RESTORE);
                BringWindowToTop(p.MainWindowHandle);
                SetFocus(new HandleRef(null, p.MainWindowHandle));
            }

            foreach (Process p in Processes)
            {
                SetForegroundWindow(p.MainWindowHandle);
            }