screenshot_without_titlebar.py

import io
import pyautogui
from time import sleep
import win32clipboard
from PIL import ImageGrab
import win32gui

toplist, winlist = [], []


def enum_cb(hwnd, results):
    winlist.append((hwnd, win32gui.GetWindowText(hwnd)))


win32gui.EnumWindows(enum_cb, toplist)

handles = [(hwnd, title)
           for hwnd, title in winlist if 'nokia' in title.lower()]
# just grab the hwnd for first window matching firefox
hwnd = handles[0]
win32gui.SetForegroundWindow(hwnd)
bbox = win32gui.GetWindowRect(hwnd)
# add 10px to the left and top, and subtract 10px from the right and bottom
bbox = (bbox[0] + 10, bbox[1] + 40, bbox[2] - 10, bbox[3] - 10)
# move cursor using pyautogui
# pyautogui.moveTo(bbox[0]+5, bbox[1]+5)
# without above line, sometimes it captures different region in Windows 11.
sleep(1)
img = ImageGrab.grab(bbox)
# img.show()
# copy image to clipboard
# img.save('nokia.png')
win32clipboard.OpenClipboard()
win32clipboard.EmptyClipboard()
with io.BytesIO() as output:
    img.convert("RGB").save(output, "BMP")
    data = output.getvalue()[14:]

win32clipboard.SetClipboardData(win32clipboard.CF_DIB, data)
win32clipboard.CloseClipboard()