python ctypes, call user32 and kernel32 func with arguments

Question

I need to know how many arguments to pass in user32 and kernel32 functions for example :

windll.kernel32.GetConsoleTitle()

I get Error :

:ValueError: Procedure probably called with not enough arguments (4 bytes missing)

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– Marc LaFleur, Commented Jan 27, 2018 at 16:28

ababak · Accepted Answer · 2018-01-27 10:31:46Z

1

You should read the API decscription. Here's the link for GetConsoleTitle: https://learn.microsoft.com/en-us/windows/console/getconsoletitle

DWORD WINAPI GetConsoleTitle(
  _Out_ LPTSTR lpConsoleTitle,
  _In_  DWORD  nSize
);

Update: Here's a short demo of getting console window title:

import ctypes
MAX_BUFFER = 260
title_text_buffer = (ctypes.c_char * MAX_BUFFER)()
res = ctypes.windll.kernel32.GetConsoleTitleA(title_text_buffer, MAX_BUFFER)
title_text = title_text_buffer.value
print title_text

edited Jan 27, 2018 at 10:31

answered Jan 27, 2018 at 9:52

ababak

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2 Comments

louay_075 Over a year ago

thank you @ababak, and where can i find other functions docs example user32, shell32 to learn it?

ababak Over a year ago

The link I've provided in my answer has other functions listed as well.

Gringo Suave · Accepted Answer · 2020-02-04 19:29:55Z

1

Tiny update to above code:

>>> import ctypes

>>> MAX_LEN = 256
>>> buffer_ = ctypes.create_unicode_buffer(MAX_LEN)
>>> ctypes.windll.kernel32.GetConsoleTitleW(buffer_, MAX_LEN)
5
>>> buffer_.value
'Command Prompt - python'

edited Feb 4, 2020 at 19:29

answered Oct 2, 2018 at 22:36

Gringo Suave

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