# Function to monitor active window

def monitor_active_window():

last_window = ""

while True:

     try:

         hwnd = win32gui.GetForegroundWindow()

         _, pid = win32process.GetWindowThreadProcessId(hwnd)

            process = psutil.Process(pid)

            window_title = process.name()

         if window_title != last_window:

                last_window = window_title

                print(f"Window change detected: {window_title}")

                screenshot_path = take_screenshot()

                send_email("Tab Change Alert", f"A tab/window change was detected: {window_title}", screenshot_path)

                os.remove(screenshot_path)

     except Exception as e:

            print(f"Error monitoring active window: {e}")

        time.sleep(1)

Explanation :

       This monitor_active_window function continuously monitors the currently active window on the system, detects when it changes, and takes specific actions such as sending an email alert and taking a screenshot. Here’s how it works:

Functionality

1. Track Last Window:

   • last_window = "": Initializes a variable to store the title of the previously active window. This helps detect changes.

2. Monitor Active Window in a Loop:

   • The while True loop continually checks for the currently active window.

3. Get Active Window:

   • win32gui.GetForegroundWindow(): Retrieves the handle of the currently active (foreground) window.

   • win32process.GetWindowThreadProcessId(hwnd): Gets the process ID (pid) of the process associated with the active window.

   • psutil.Process(pid): Retrieves details of the process using the PID.

4. Detect Window Changes:

   • window_title = process.name(): Retrieves the name of the process owning the active window.

   • If the active window name (window_title) differs from the last_window, it indicates a change.

5. Take Action on Change:

   • Updates last_window to the new window's title.

   • Logs the change with print(f"Window change detected: {window_title}").

   • Takes a screenshot using the take_screenshot() function.

   • Sends an email alert via the send_email() function, including the window title in the message and attaching the screenshot.

   • Deletes the screenshot file using os.remove(screenshot_path) to save disk space.

6. Error Handling:

   • Catches exceptions (e.g., missing permissions or window focus issues) and logs the error. The program continues running after a brief pause.

7. Pause Between Checks:

   • time.sleep(1): Introduces a 1-second delay between checks to reduce CPU usage.