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ReadInterfacePtr() - Crashes Windows Live Messenger
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matty
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O.P. ReadInterfacePtr() - Crashes Windows Live Messenger
Patchou,

It is time we are told how this works so that we cannot keep crashing WLM with it :)

jscript code:
var hWnd = Interop.Call('user32', 'FindWindowExW', Messenger.ContactListWndHandle, 0, 'Main Window Class', '');
hWnd = Interop.Call('user32', 'FindWindowExW', hWnd, 0, 'DirectUIHWND', '');

if (hWnd === 0) return;

var IID_IAccessible = Interop.Allocate(16);
with (IID_IAccessible) { WriteDWORD(0, 0x618736E0); WriteWORD(4, 0x3C3D); WriteWORD(6, 0x11CF); SetAt(8, 0x81); SetAt(9, 0xc); SetAt(10, 0x0); SetAt(11, 0xaa); SetAt(12, 0x0); SetAt(13, 0x38); SetAt(14, 0x9b); SetAt(15, 0x71); }

var IAccessible = Interop.Allocate(4);

Debug.Trace(Interop.Call('oleacc', 'AccessibleObjectFromWindow', hWnd, 0xFFFFFFFC /* OBJID_CLIENT */, IID_IAccessible, IAccessible));

IAccessible.ReadInterfacePtr(0); // crash occurs here!

This requires the main contact list window to be opened.

The last line should provide access to the IAccessible interface but instead it crashes WLM.

I also emailed this to you but I know you aren't really concerned about it with the beta currently going on however I wonder if there is a bug in Plus! causing this to crash and not work corectly.
10-12-2008 07:48 PM
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Messages In This Thread
ReadInterfacePtr() - Crashes Windows Live Messenger - by matty on 10-12-2008 at 07:48 PM
RE: ReadInterfacePtr() - Crashes Windows Live Messenger - by Eljay on 10-15-2008 at 04:58 PM
RE: ReadInterfacePtr() - Crashes Windows Live Messenger - by mynetx on 10-17-2008 at 12:07 PM
RE: ReadInterfacePtr() - Crashes Windows Live Messenger - by Patchou on 10-19-2008 at 06:08 PM
RE: ReadInterfacePtr() - Crashes Windows Live Messenger - by matty on 10-19-2008 at 06:12 PM


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