SetValue and Release are not functions - winapi

Question

In summary: I searched MSDN and thought to create my own SetValue but I can't find any sourcecode for it. It's not in a DLL, its like InitPropVariantFromString, it's in a header file, but I can't find it. :( If you can please just show me htat C++ code I'll take it from there :)
Bottom stuff is to show the efforts I put on it.
This is the tiny C++ code I'm converting:
OnCreate(HWND hwnd, LPCREATESTRUCT lpcs)
{
IPropertyStore *pps;
HRESULT hr = SHGetPropertyStoreForWindow(hwnd, IID_PPV_ARGS(&pps));
if (SUCCEEDED(hr)) {
IPropertyStore_SetValue(pps, PKEY_AppUserModel_ID, L"Contoso.Scratch");
}
}
I have translated this to:
var ppv = ctypes.voidptr_t(0);
var pps = new IID();
var HR_pps = CLSIDFromString('{886D8EEB-8CF2-4446-8D02-CDBA1DBDCF99}', pps.address());
if (!checkHRESULT(HR_pps)) { throw new Error('checkHRESULT error'); }
var hr = SHGetPropertyStoreForWindow(hwnd, pps.address(), ppv.address());
if (!checkHRESULT(hr)) { throw new Error('checkHRESULT error'); }
var pszValue = ctypes.jschar.array()('Contoso.Scratch'); // PCWSTR
IPropertyStore_SetValue(pps.address(), PKEY_AppUserModel_ID, pszValue.address());
This IPropertyStore_SetValue I converted from this C++:
HRESULT IPropertyStore_SetValue(IPropertyStore *pps, REFPROPERTYKEY pkey, PCWSTR pszValue)
{
PROPVARIANT var;
HRESULT hr = InitPropVariantFromString(pszValue, &var);
if (SUCCEEDED(hr)) {
hr = pps->SetValue(pkey, var);
PropVariantClear(&var);
}
return hr;
}
I got it to:
var struct_PROPVARIANT = ctypes.StructType('PROPVARIANT', [
{'fntud': struct_GUID}, // GUID
{'pid': ctypes.unsigned_long}, // DWORD
// comment from loomo on union :: union not supported by js-ctypes https://bugzilla.mozilla.org/show_bug.cgi?id=535378 "You can always typecast pointers, at least as long as you know which type is the biggest"
// so now in my case i know that InitPropVariantFromString is looking to se the pwszVal so forget all the other crap in the union and just leave this one
{'pwszVal': new ctypes.PointerType(ctypes.jschar)} // LPWSTR
]);
var IPropertyStore_SetValue = function(pps /** IPopertyStore pointer **/, pkey /** PROPERTYKEY **/, pszValue /** PCWSTR **/) {
var v = new struct_PROPVARIANT(); // PROPVARIANT
var rez = InitPropVariantFromString(pszValue, v.address());
if (rez) {
console.info('pps.SetValue', pps.SetValue);
pps.SetValue(pkey, v);
} else {
throw new Error('failed InitPropVariantFromString');
}
return true;
}
So this required me to write InitPropVariantFromString which I did:
function InitPropVariantFromString(string /** PCWSTR **/, propvarPtr /** PROPVARIANT pointer **/) {
var hr = SHStrDup(string, propvarPtr.contents.pwszVal.address());
if (!checkHRESULT(hr)) {
//PropVariantInit(propvarPtr); //can skip this, it just does a memset
}
return true;
}
A SMALL ASIDE ON MY SHSTRDUP DILEMMA (not a question just showing i worked hard and through unexplainable weirdness got it to work)
So this required me to do SHStrDup which I thought would take two
arguments of ctypes.jschar.ptr as it is first argument of LPCTSTR
and second arg of LPTSTR.
For the first argument, i was passing the PCWSTR of recall
ctypes.jschar.array()('Contoso.Scratch'). So when I the first arg
definition set to ctypes.jschar.ptr it wouldn't work use it throws
this error: expected type pointer, got
ctypes.jschar.array(16).ptr(ctypes.UInt64("0x2855b560"))
So I change in the defintion from ctypes.jschar.ptr to
ctypes.voidptr_t in defintion so then it worked for this argument
but then threw error on second argument recall the
propvarPtr.contents.pwszVal.address():
ctypes.jschar.ptr.ptr(ctypes.UInt64("0x20fdb3b4")),
So then I just ended up setting both arguments of SHStrDup to
ctypes.voidptr_t and it worked. Don't know why but it worked. And
propvarPtr.contents.pwszVal is definitely getting populated, because
when I console.log it it shows: "propvarPtr.contents.pwszVal" CData {
contents: "C" }.
So the final SHStrDup defintion looked like this:
/* http://msdn.microsoft.com/en-us/library/windows/desktop/bb759924%28v=vs.85%29.aspx
* HRESULT SHStrDup(
* __in_ LPCTSTR pszSource,
* __out_ LPTSTR *ppwsz
* );
*/
var SHStrDup = shlwapi.declare('SHStrDupW', ctypes.winapi_abi, ctypes.long, // HRESULT
ctypes.voidptr_t, // LPCTSTR // should be ctypes.jschar.ptr OR ctypes.char.ptr // im trying to pass PCWSTR here, which is `ctypes.jschar.array()('blah blah').address()`
ctypes.voidptr_t // LPTSTR // should be ctypes.jschar.ptr OR ctypes.char.ptr // im trying to pass address to struct_PROPVARIANT.pwszVal which is new ctypes.PointerType(ctypes.jschar)
);
So now all that is passing and I end up back in IPropertyStore_SetValue in this if:
var rez = InitPropVariantFromString(pszValue, v.address());
if (rez) {
console.info('pps.SetValue', pps.SetValue);
pps.SetValue(pkey, v);
} else {
throw new Error('failed InitPropVariantFromString');
}
Now rez is true, so then it now tries pps.SetValue and this is where it goes kaput and I can't figure out how to fix it. :(
I searched MSDN and thought to create my own SetValue but I can't find any sourcecode for it. It's not in a DLL, its like InitPropVariantFromString, it's in a header file, but I can't find it. :( If you can please just show me htat C++ code I'll take it from there :)

Answer 1

Solved, I had to use VTBL: https://github.com/Noitidart/_scratchpad/blob/master/IPropertyStore%20COM%20jsctypes.js
The order of the defintions in the Vtbl matter big time. So make sure its correct if you want to do something with Vtbls
var IPropertyStoreVtbl = new ctypes.StructType('IPropertyStoreVtbl');
var IPropertyStore = new ctypes.StructType('IPropertyStore', [{
'lpVtbl': IPropertyStoreVtbl.ptr
}]);
this.IPropertyStorePtr = new ctypes.PointerType(IPropertyStore);
IPropertyStoreVtbl.define(
[{ //start inherit from IUnknown
'QueryInterface': ctypes.FunctionType(ctypes.stdcall_abi,
this.HRESULT, [
IPropertyStore.ptr,
this.REFIID, // riid
this.VOIDPTR // **ppvObject
]).ptr
}, {
'AddRef': ctypes.FunctionType(ctypes.stdcall_abi,
this.ULONG, [
IPropertyStore.ptr
]).ptr
}, {
'Release': ctypes.FunctionType(ctypes.stdcall_abi,
this.ULONG, [
IPropertyStore.ptr
]).ptr
}, { //end inherit from IUnknown //start IPropertyStore
'GetCount': ctypes.FunctionType(ctypes.stdcall_abi,
this.HRESULT, [
IPropertyStore.ptr,
this.DWORD.ptr // *cProps
]).ptr
}, {
'GetAt': ctypes.FunctionType(ctypes.stdcall_abi,
this.HRESULT, [
IPropertyStore.ptr,
this.DWORD, // iProp
this.PROPERTYKEY.ptr //*pkey
]).ptr
}, {
'GetValue': ctypes.FunctionType(ctypes.stdcall_abi,
this.HRESULT, [
IPropertyStore.ptr,
this.REFPROPERTYKEY, // key
this.PROPVARIANT.ptr // *pv
]).ptr
}, {
'SetValue': ctypes.FunctionType(ctypes.stdcall_abi,
this.HRESULT, [
IPropertyStore.ptr,
this.REFPROPERTYKEY, // key
this.REFPROPVARIANT // propvar
]).ptr
}, {
'Commit': ctypes.FunctionType(ctypes.stdcall_abi,
this.HRESULT, [
IPropertyStore.ptr
]).ptr
}]
);
Then to get the IPropertyStore of a window:
var ppsPtr = new ostypes.IPropertyStorePtr();
var hr_SHGetPropertyStoreForWindow = _dec('SHGetPropertyStoreForWindow')(cHwnd, IID_IPropertyStore.address(), ppsPtr.address());
checkHRESULT(hr_SHGetPropertyStoreForWindow, 'SHGetPropertyStoreForWindow');
var pps = ppsPtr.contents.lpVtbl.contents;
now you can use IPropertyStore :: SetValue and IPropertyStore :: Release but make sure to pass the ppsPtr as first argument to them then the remaining arguments are what you would expect: var hr = pps.SetValue(ppsPtr, firstArgOf_SetValue, secondArgOf_SetValue)
EDIT:
adding copy paste runnable script from scratchpad.
Copy and paste this: http://pastebin.mozilla.org/8429999
this will do the equivalent of this XPCOM:
var win = Services.wm.getMostRecentWindow(null);
Cc["#mozilla.org/windows-taskbar;1"].getService(Ci.nsIWinTaskbar).setGroupIdForWindow(win, 'Contoso.Scratch')
Yes its long but the good thing about it is, there is no XPCOM to set RelaunchCommand and RelaunchIconResource etc. Thats why js-ctypes is needed.