Monthly Archives: March 2012

Win32 Python: Getting all window titles

This post shows how you can retrieve all window titles in Microsoft Windows using Python’s ctypes module. Moreover, it also acts as a ctypes tutorial, showing how to create and use callback functions.

The following is the full code. Keep reading if you want to understand how it works. (Note: If you are reading this as a ctypes tutorial and are having trouble following the explanation, you may want to go through my previous tutorial first.)

import ctypes

EnumWindows = ctypes.windll.user32.EnumWindows
EnumWindowsProc = ctypes.WINFUNCTYPE(ctypes.c_bool, ctypes.POINTER(ctypes.c_int), ctypes.POINTER(ctypes.c_int))
GetWindowText = ctypes.windll.user32.GetWindowTextW
GetWindowTextLength = ctypes.windll.user32.GetWindowTextLengthW
IsWindowVisible = ctypes.windll.user32.IsWindowVisible

titles = []
def foreach_window(hwnd, lParam):
	if IsWindowVisible(hwnd):
		length = GetWindowTextLength(hwnd)
		buff = ctypes.create_unicode_buffer(length + 1)
		GetWindowText(hwnd, buff, length + 1)
	return True
EnumWindows(EnumWindowsProc(foreach_window), 0)


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