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kaz

Init PropVariant From Binary

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Hello from france,

I need to write a binary value to a propvariant.

I found on the forum a function to put a string but nothing else.

; Global Const $tagPROPERTYKEY = $tagGUID & ';DWORD pid'
Global Const $tagPROPERTYKEY = 'struct;ulong Data1;ushort Data2;ushort Data3;byte Data4[8];DWORD pid;endstruct'
Global $tagPROPVARIANT = _
        'USHORT vt;' & _ ;typedef unsigned short VARTYPE; - in WTypes.h
        'WORD wReserved1;' & _
        'WORD wReserved2;' & _
        'WORD wReserved3;' & _
        'LONG;PTR'  ;union, use the largest member (BSTRBLOB, which is 96-bit in x64)
 
 
 Local $tPROPVARIANT = DllStructCreate($tagPROPVARIANT)
 
 ....
 
; https://www.autoitscript.com/forum/topic/168099-how-to-prevent-multiple-guis-from-combining-in-the-taskbar/
; This function is not exposed in any dll, but inlined in propvarutil.h so we need to rewrite it entirely in AutoIt
Func _WinAPI_InitPropVariantFromString($sUnicodeString, ByRef $tPROPVARIANT)
    DllStructSetData($tPROPVARIANT, 'vt', $VT_LPWSTR)
    Local $aRet = DllCall('Shlwapi.dll', 'LONG', 'SHStrDupW', _
            'WSTR', $sUnicodeString, 'PTR', DllStructGetPtr($tPROPVARIANT) + 8)

    If @error Then Return SetError(@error, @extended, False)
    Local $bSuccess = $aRet[0] == 0

    ; If fails, zero memory of the current PROPVARIANT struct
    If (Not $bSuccess) Then $tPROPVARIANT = DllStructCreate($tagPROPVARIANT)
    Return SetExtended($aRet[0], $bSuccess)
EndFunc

PROPVARIANT structure :

https://docs.microsoft.com/en-us/windows/desktop/api/propidl/ns-propidl-tagpropvariant

My knowledge about structure and dll call isn't very well.

Anyone can help?

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Hello. 

Could you describe what you're trying to do. maybe share a C++ sample or so. what VARTYPE do you want to write to the structure.

 

Saludos

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I looked on that page you linked to and can't see where it uses this struct, which function are you looking at that uses this struct, and what EXACTLY are you attempting to do with that code once you've "recreated" it?


If I posted any code, assume that code was written using the latest release version unless stated otherwise. Also, if it doesn't work on XP I can't help with that because I don't have access to XP, and I'm not going to.
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I want to be able to add a shortcut to configuration panel in the WIN X menu.

It's only one tweak when i install a new Windows 10.

A shortcut must be create, it's ok

A string must be hash, it's ok.

The hash must be insert into the shortcut, it's this part my problem.

I searched and found only one solution near that i wanted : _WinAPI_InitPropVariantFromString(..)

With this function, it's possible to insert a string into a shortcut, but it's not exactly that i want.

In C++, it's only 

CComPtr<IPropertyStore> store;
hr = lnk->GetPropertyStore(GPS_READWRITE, IID_PPV_ARGS(&store));
CHECKHR(hr, L"Failed to get property store.");

PROPVARIANT propValue = {0};
propValue.ulVal = hash;
propValue.vt = VT_UI4;

hr = store->SetValue(PKEY_WINX_HASH, propValue);
CHECKHR(hr, L"Failed to set property store value.");

hr = store->Commit();
CHECKHR(hr, L"Failed to write changes to .lnk.");

I didn't found a simple way.

I hope my explanations are clear.

 

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