Sometimes we need to use Win32 APIs in Python. This article explains how to use Win32 APIs in Python.
To use Win32 APIs in Python we can use the following options.
Using the PyWin32 package
One of the most popular options is the PyWin32 library, which provides Python bindings for many Win32 API functions.
Here’s an example of using PyWin32 to call the
MessageBox() function from the Win32 API:
pip install pywin32
import win32api import win32con win32api.MessageBox(win32con.NULL, 'Hello from NoloWiz!', 'Test Window', win32con.MB_OK)
This code imports the
win32con modules from the PyWin32 library. It then calls the
MessageBox() function from the Win32 API using the
win32api.MessageBox() function. The first argument to
MessageBox() is the handle to the owner window, which is set to
win32con.NULL to indicate that there is no owner window. The second argument is the message to display, and the third argument is the title of the message box. The fourth argument specifies the buttons to display in the message box, which is set to
win32con.MB_OK to display an OK button
In the above code, the win32con is a module in the pywin32 package that provides constants(win32con.MB_OK) used in Windows API calls. The win32con module contains constants for various Windows messages, window styles, keyboard codes, system parameters, and error codes.
Use ctypes to call Win32 APIs
The ctypes is a foreign function library for Python that allows calling functions in shared libraries or DLLs and provides C compatible data types. We can use ctypes to call Win32 API functions. The ctypes is a standard library in Python, which means it is included with every Python installation.
Here is an example :
import ctypes user32 = ctypes.windll.user32 user32.MessageBoxW(None, 'Hello from NoloWiz!', 'Test Window', 0)
This code uses the windll attribute of the ctypes module to load the user32 DLL, which contains the MessageBoxW() function. It then calls the MessageBoxW() function using user32.MessageBoxW() function. The first argument to MessageBoxW() is the handle to the owner window. The second argument is the message to display, and the third argument is the title of the message box. The fourth argument specifies the buttons to display in the message box.
Note that the
windll object is used for calling functions that use the stdcall calling convention, while the
cdll object is used for calling functions that use the cdecl calling convention.
In conclusion, we can easily use the Win32 APIs using the pywin32 package and ctypes.