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Using Pythonwin to poke at Windows apps?

From: Henrik Weber <Henr...@sdm.de>
11 Mar 2004 05:26:48 -0800
Thomas Heller <theller at python.net> wrote in message news:<mailman.177.1078844655.19534.python-list at python.org>...
> Henrik.Weber at sdm.de (Henrik Weber) writes:> > > Hello all,> >> > I'm trying to read information about widgets from running instances of> > win32 applications. My current victim is the Explorer on a XP box. I'm> > trying to access the menu bar. On XP this is not a standard menu but a> > toolbar. So far I can retrieve a PyCWnd object with win32ui:> >> >>>> e = win32ui.FindWindow("ExploreWClass", None)> >>>> w = win32ui.FindWindowEx(e, None, "WorkerW", None)> >>>> w = win32ui.FindWindowEx(w, None, "ReBarWindow32", None)> >>>> t = win32ui.FindWindowEx(w, None, "ToolbarWindow32", None)> >>>> t = win32ui.FindWindowEx(w, t, "ToolbarWindow32", None)> >>>> hex(t.GetSafeHwnd())>  '0x602d8'> >>>> print t> > object 'PyCWnd' - assoc is 01275A88, vi=<None>, notify=0,ch/u=0/0,> > mh=0, kh=0> >> > I know that t now refers to a ToolbarWindow32 widget but seemingly> > win32ui doesn't. Is there a way to get a PyCToolbar object from this?> > No idea.

I had hoped that there might be a way to cast or convert a PyCWnd
object to an object of a child class or to construct a PyCToolbar
object from an hwnd, something like that.

> > > Or do I have to continue by sending messages? I tried sending a> > TB_GETBUTTON message with win32gui.SendMessage, using a Python array> > to reserve some memory for the TBBUTTON structure, but so far I have> > only succeeded in crashing the Explorer. What would be the right way> > to send a message that needs some memory to put the results into?> > If you go this way, ctypes is what you need.  And Simon Bruning has> written a series of articles which also might be helpful:> > http://www.brunningonline.net/simon/blog/archives/000652.html

Yes, I've read those articles. He does something similar to what I
want where he retrieves the content from an edit widget. My attempt
that I described above was inspired by this.

Now I've tried this with ctypes:

from ctypes import *
import win32ui, win32con

e = win32ui.FindWindow("ExploreWClass", None)
w = win32ui.FindWindowEx(e, None, "WorkerW", None)
w = win32ui.FindWindowEx(w, None, "ReBarWindow32", None)
t = win32ui.FindWindowEx(w, None, "ToolbarWindow32", None)
t = win32ui.FindWindowEx(w, t, "ToolbarWindow32", None)

class TBBUTTON(Structure):
    _fields_ = (("iBitmap", c_int),
                ("idCommand", c_int),
                ("fsState", c_byte),
                ("fsStyle", c_byte),
                ("bReserved", c_byte * 2),
                ("dwData", POINTER(c_long)),
                ("iString", c_char_p))

b = TBBUTTON()
f = windll.user32.SendMessageA
TB_GETBUTTON = win32con.WM_USER + 23
print f(t.GetSafeHwnd(), TB_GETBUTTON, 0, byref(b))


When I run it the first time I get a return value 1. However the
TBBUTTON structure contains mostly zeroes. Running it again crashes
the Explorer. Even if I open another Explorer the script will crash it
with every subsequent execution until the machine is rebooted.

So obviously I'm doing something wrong, but what?


Henrik

Recent Messages in this Thread
Henrik Weber Mar 09, 2004 02:00 pm
Thomas Heller Mar 09, 2004 03:03 pm
Henrik Weber Mar 11, 2004 01:26 pm
Thomas Heller Mar 11, 2004 03:08 pm
Henrik Weber Mar 15, 2004 12:58 pm
Messages in this thread