[python-win32] How to get IWebBrowser2 from a HWND

[salvatore ventura]

Hi,
 I am trying to get the IWebBrowser2 object from the HWND of an open IE window.

 I have seen this topic covered in many languages, and I am following the same steps, but in python, yet I am hitting a wall that I can't figure how to break...  So, yes, I have been 'googling', browsing and testing many options, but without the desired result. 

So, here details about my python installation on WinXP:
 - python-2.5.2.msi
 - pywin32-210.win32-py2.5.exe
 - comtypes-0.4.2.win32.exe
 - ServProv.tlb --> used to generate the IServiceProvider wrappers


Now, my scenario is IE7 already open on a webpage 'Page1', and a modal popup webpage 'Modal1', which is not a Messagebox/Alert. Once that is up, the following code is supposed to retrieve the IWebBrowser2 object of the 'Modal1' window.


(assume all the imports are done correctly)
# get the window, and then reach the 'Internet Explorer_Server'
win1 = win32gui.FindWindow('Internet Explorer_TridentDlgFrame', 'Modal1')
win1 = winGuiAuto.findControl(win1, None, 'Internet Explorer_Server', None)

# get ready to get the IHTMLDocument2 from win1
#
#
oleacc = oledll.LoadLibrary ( 'oleacc.dll' )
WM_HTML_GETOBJECT = windll.user32.RegisterWindowMessageA ('WM_HTML_GETOBJECT' )
lResult = c_ulong ( )
pIHTMLDocument2 = POINTER ( IHTMLDocument2 ) ( )

ret = windll.user32.SendMessageTimeoutA ( c_int ( win1 ), c_int (WM_HTML_GETOBJECT),c_int ( 0 ), c_int ( 0 ), c_int ( SMTO_ABORTIFHUNG ), c_int ( 1000 ), byref (lResult ) )
oleacc.ObjectFromLresult ( lResult, byref ( IHTMLDocument2._iid_ ), 0,byref (pIHTMLDocument2 ) )

# at this point pIHTMLDocument2 is at the right window, as the 'title' property gives me what I expect

# now followup to get the parent ...
ihtmlwin = pIHTMLDocument2.parentWindow

# ... the service provider ...
pIServiceProvider = ihtmlwin.QueryInterface(IServiceProvider, IServiceProvider._iid_)

# ... and the IWebBrowser2:
ie = pIServiceProvider.QueryService(IWebBrowserApp._iid_, IWebBrowser2._iid_)

# which - of course - fails.


Error returned: 
Traceback (most recent call last):
  File "<interactive input>", line 1, in <module>
COMError: (-2147467262, 'No such interface supported', (None, None, None, 0, None))


which would imply that I am in the wrong 'place'. But I can't see how.

I must be doing something wrong, but can't figure what. Any help very much appreciated, and sorry for the long post.

regards,
.salvo


ps. this a link to one of the places that describe the procedure i have followed:

http://www.forum.it-berater.org/index.php?topic=574.msg1060#msg1060