_IEAttach failes and crashes on some special window constellations

[Samoth]

When there is a Web Browser window open not being a TopLevelContainer the function _IEAttach will exit with an error:

E:\Bin\autoit\install\Include\IE.au3 (2675) : ==> The requested action with this object has failed.:
Return SetError($_IEStatus_Success, 0, HWnd($o_object.HWnd()))
Return SetError($_IEStatus_Success, 0, HWnd($o_object.HWnd()^ ERROR

This can be solved by modifying IE.au3 checking whether your IE object is a TopLevelContainer and respond accordingly in Func _IEPropertyGet(ByRef $o_object, $s_property) from line 2669 on as described in my ​post in the forum. The problem is pretty well caught down over there.

[...] lines 1-2668
Case $s_property = "hwnd"
    If Not __IEIsObjType($o_object, "browser") Then
        __IEErrorNotify("Error", "_IEPropertyGet", "$_IEStatus_InvalidObjectType")
        Return SetError($_IEStatus_InvalidObjectType, 1, 0)
    EndIf
    ;--------------OLD-CODE:
    ;Return SetError($_IEStatus_Success, 0, HWnd($o_object.HWnd()))
    ;--------------NEW-CODE:
    If $o_object.TopLevelContainer Then
        Return SetError($_IEStatus_Success, 0, HWnd($o_object.HWnd()))
    Else
        Return SetError($_IEStatus_Success, 0, 0)
    EndIf
    ;--------------:NEW-CODE
[...]

It was the same problem in ticket ​#1415 but this is already closed for not being precise enough. I hope this ticket will help out. As said in this ​post I should open a ticket. And I searched for a double before finding only this closed one ;-)

[trancexx]

This is not bug and that's not solution.
Create and use COM error handler to avoid situations like that.