Example of using some basic winuser.h calls to get info and resize a window in Python using ctypes

win_resize_example.py

import os
import time
import ctypes
from ctypes import wintypes

def get_window_title(h_wnd):
    max_length = 255
    title = ctypes.create_unicode_buffer(max_length)
    ctypes.windll.user32.GetWindowTextW(h_wnd, title, max_length)
    return title.value

def get_window_pid(h_wnd):
    pid = wintypes.DWORD()
    ctypes.windll.user32.GetWindowThreadProcessId(h_wnd, ctypes.byref(pid))
    return pid.value

def get_foreground_window():
    return ctypes.windll.user32.GetForegroundWindow()

def get_window_pos(h_wnd):
    lp_rect = wintypes.RECT()
    ctypes.windll.user32.GetWindowRect(h_wnd, ctypes.byref(lp_rect))
    return lp_rect.left, lp_rect.top, lp_rect.right - lp_rect.left, lp_rect.bottom - lp_rect.top

def set_window_pos(h_wnd, x, y, w, h):
    SWP_NOZORDER = 0x0004
    ctypes.windll.user32.SetWindowPos(h_wnd, 0, x, y, w, h, SWP_NOZORDER)

last_output_len = 0

while True:
    h_wnd = get_foreground_window()
    title = get_window_title(h_wnd)
    pid = get_window_pid(h_wnd)
    itself = pid == os.getpid() or pid == os.getppid()

    output = f"{h_wnd = }, {pid = }, {title = }{' (itself)' if itself else ''}"
    print(output + " "*(last_output_len - len(output)) if len(output) < last_output_len else output, end='\r', flush=True)
    last_output_len = len(output)

    x, y, w, h = get_window_pos(h_wnd)
    set_window_pos(h_wnd, x, y, w, h)
    
    time.sleep(0.1)