Question

I want to get the focused window so I can resize it… how can I do it?

Answer 1

Use the GetForegroundWindow Win32 API to get the window handle.

Then use the MoveWindow (or SetWindowPos if you prefer) win32 API to resize the window.

Working with the Win32 API can be done directly with ctypes and working with the dlls or by using the pywin32 project.

Edit: Sure here is an example (Make sure you have pywin32 installed):

import win32gui
hwnd = win32gui.GetForegroundWindow()
win32gui.MoveWindow(hwnd, 0, 0, 500, 500, True)