Help to Understand <ie.au3> UDF and DllStructCreate() Issue

[Colyn1337]

I've been working on a problem using the IE udf and have delved into its code.  Part of what I'm trying to do is get an object from an embedded IE control using it's handle.  In the IE udf there's an internal function which does this:

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Func __IEControlGetObjFromHWND(ByRef $hWin)
    ; The code assumes CoInitialize() succeeded due to the number of different
    ; yet successful return values it has.
    DllCall("ole32.dll", "long", "CoInitialize", "ptr", 0)
    If @error Then Return SetError(2, @error, 0)

    Local Const $WM_HTML_GETOBJECT = __IERegisterWindowMessage("WM_HTML_GETOBJECT")
    Local Const $SMTO_ABORTIFHUNG = 0x0002
    Local $lResult

    __IESendMessageTimeout($hWin, $WM_HTML_GETOBJECT, 0, 0, $SMTO_ABORTIFHUNG, 1000, $lResult)

    Local $typUUID = DllStructCreate("int;short;short;byte[8]")
    DllStructSetData($typUUID, 1, 0x626FC520)
    DllStructSetData($typUUID, 2, 0xA41E)
    DllStructSetData($typUUID, 3, 0x11CF)
    DllStructSetData($typUUID, 4, 0xA7, 1)
    DllStructSetData($typUUID, 4, 0x31, 2)
    DllStructSetData($typUUID, 4, 0x0, 3)
    DllStructSetData($typUUID, 4, 0xA0, 4)
    DllStructSetData($typUUID, 4, 0xC9, 5)
    DllStructSetData($typUUID, 4, 0x8, 6)
    DllStructSetData($typUUID, 4, 0x26, 7)
    DllStructSetData($typUUID, 4, 0x37, 8)

    Local $aRet = DllCall("oleacc.dll", "long", "ObjectFromLresult", "lresult", $lResult, "struct*", $typUUID, _
            "wparam", 0, "idispatch*", 0)
    If @error Then Return SetError(3, @error, 0)

    If IsObj($aRet[4]) Then
       _arraydisplay($aRet)
        Local $oIE = $aRet[4] .Script()
        ; $oIE is now a valid IDispatch object
        Return $oIE.Document.parentwindow
    Else
        Return SetError(1, $aRet[0], 0)
    EndIf
EndFunc

The problem I'm experiencing with the UDF is that I get this error:

Return $oIE.Document.parentwindow

Return $oIE.Document^ ERROR

 

Which I tracked down to that section of code up above.  Since the script values the data in $aRet[4] I decided to see what that array has in it.  After the DllCall I added an _arraydisplay($aRet) so I could see what was there.  Much to my chagrin it was blank.  No zero or any kind of data, just white space.  This led me to the DllCall itself and I wanted to see the values being passed to oleacc.dll.  I added a console write to the code just before the DllCall like this:

 

ConsoleWrite("oleacc.dll " & " long " & " ObjectFromLresult " & " lresult " & $lResult & " struct* " & $typUUID  & " wparam " & " 0 " & " idispatch* " & " 0 ")

And got the following output:

oleacc.dll  long  ObjectFromLresult  lresult 49267 struct*  wparam  0  idispatch*  0 49267

 

$1Result is populated with 49267

$typUUID is null

 

The contents of the $aRet array are as follows:

[0]    0

[1]    49267

[2]    

[3]    0

[4]    

Position 4 in the array is what's valued to create the $oIE.Document.parentwindow object to return.  As noted above, position 4 is empty.  This leads me to investigate the $typUUID variable as it is empty as well, after the DllStructCreate().  This leads me to believe that something is wrong with that part of the code, I just don't know what.  

Any suggestions?

Edited October 3, 2013 by Colyn1337

[BrewManNH]

Are you using this internal function directly, or is it erroring when you use it correctly?

[Colyn1337]

Both.  I kept getting that error I referenced with using the _IExxx udf which led me to investigate.

Edited October 3, 2013 by Colyn1337

[Colyn1337]

This is the error info from the error handler.  

 

--> COM Error Encountered in asdf.au3

----> $IEComErrorScriptline = 3633

----> $IEComErrorNumberHex = 80020009

----> $IEComErrorNumber = -2147352567

----> $IEComErrorWinDescription = Access is denied.

----> $IEComErrorDescription = Access is denied.

----> $IEComErrorSource = 

----> $IEComErrorHelpFile = C:WindowsSysWOW64mshtml.hlp

----> $IEComErrorHelpContext = 0

----> $IEComErrorLastDllError = 0

 

Does anyone know if the error is from oleacc.dll or from the application?

Edited October 7, 2013 by Colyn1337