Python: How to get the text label from another program window?

Question

I want to read text labels from another program, with Python. I think I have to use WM_GETTEXT, but I don\'t know how and I couldn\'t find anything on the internet. My program g

Answer 1

If the text of your window has more than 20 characters, then the buffer you have created is too small. Try expanding it to more than you're likely to need:

buffer = win32gui.PyMakeBuffer(255)
length = win32gui.SendMessage(control, win32con.WM_GETTEXT, 255, buffer)

If you want to get to the controls within the main window, then use EnumChildWindows, passing the handle of the parent window. You may need to do this recursively.

Answer 2

win32gui.PyMakeBuffer has been deprecated. Also, buffer is a builtin function, so don't use it as a variable name.

Instead, just do this:

buf = " " * 255
length = win32gui.SendMessage(control, win32con.WM_GETTEXT, 255, buf)
result = buf[:length]