in my shell namespace extension context menu differs from the default one("new" and "properties" items are missed) - com

Question

I have my custom shell namespace extension.
Just want to have a virtual folder mapped to some folder on disk C:/ with the same functionality.
using namespace ATL;
class ATL_NO_VTABLE CMyShellFolder :
public CComObjectRootEx<CComMultiThreadModel>,
public CComCoClass<CMyShellFolder, &CLSID_CMyShellFolder>,
public IPersistFolder2,
public IShellFolder2,
public IExplorerPaneVisibility
{
CComHeapPtr<ITEMIDLIST_ABSOLUTE> m_pidl;
CComPtr<IShellFolder2> m_folder;
CComPtr<IThumbnailHandlerFactory> m_thFactory;
CComPtr<IUnknown> m_site;
public:
CMyShellFolder()
{
}
static HRESULT WINAPI UpdateRegistry(BOOL reg) throw();
BEGIN_COM_MAP(CMyShellFolder)
COM_INTERFACE_ENTRY(IShellFolder)
COM_INTERFACE_ENTRY(IShellFolder2)
COM_INTERFACE_ENTRY2(IPersist, IPersistFolder)
COM_INTERFACE_ENTRY(IPersistFolder)
COM_INTERFACE_ENTRY(IPersistFolder2)
COM_INTERFACE_ENTRY(IExplorerPaneVisibility)
END_COM_MAP()
DECLARE_PROTECT_FINAL_CONSTRUCT()
---------------------------------
HRESULT CMyShellFolder::BindToObject(PCUIDLIST_RELATIVE pidl, IBindCtx* pbc, REFIID riid, LPVOID* ppv)
{
if (riid == __uuidof(IShellFolder3))
return E_NOINTERFACE;
HR;
CComObject<CMyShellFolder>* folder = nullptr;
CHECKARG(pidl);
hr = E_NOINTERFACE;
if (riid == IID_IShellFolder ||
riid == IID_IShellFolder2)
{
// check it's a folder
SFGAOF atts = SFGAO_FOLDER;
auto hr2 = GetAttributesOf(1, (PCUITEMID_CHILD_ARRAY)&pidl, &atts);
if (FAILED(hr2) || !(atts & SFGAO_FOLDER))
goto cleanup; // nope, get out
CHECKHR(CreateInstanceAddRef(&folder));
CHECKHR(folder->_Initialize(this, pidl));
CHECKHR(folder->QueryInterface(riid, ppv));
}
RELEASE(folder);
HRONFAIL(L"CMyShellFolder::BindToObject");
}
HRESULT CMyShellFolder::CreateViewObject(HWND hwnd, REFIID riid, LPVOID* ppv)
{
HR;
SFV_CREATE sfvc = { 0 };
DEFCONTEXTMENU dcm = { 0 };
CHECKITEM;
CHECKARG(ppv);
hr = E_NOINTERFACE;
if (riid == IID_IShellView)
{
sfvc.cbSize = sizeof(SFV_CREATE);
CHECKHR(QueryInterface(IID_PPV_ARGS(&sfvc.pshf)));
QueryInterface(IID_PPV_ARGS(&sfvc.psfvcb));
CHECKHR(SHCreateShellFolderView(&sfvc, (IShellView**)ppv));
goto cleanup;
}
if (riid == IID_IContextMenu)
{
dcm.hwnd = hwnd;
//dcm.pidlFolder = (PCIDLIST_ABSOLUTE)m_pidl.m_pData;
QueryInterface(IID_PPV_ARGS(&dcm.pcmcb));
CHECKHR(QueryInterface(IID_PPV_ARGS(&dcm.psf)));
CHECKHR(SHCreateDefaultContextMenu(&dcm, riid, ppv));
goto cleanup;
}
if (riid == IID_ITransferSource || // for delete & file operations
riid == IID_IDropTarget) // for copy paste & dd
{
CHECKHR(m_folder->CreateViewObject(hwnd, riid, ppv));
goto cleanup;
}
CHECKHR(m_folder->CreateViewObject(hwnd, riid, ppv));
cleanup:
RELEASE(dcm.pcmcb);
RELEASE(dcm.psf);
RELEASE(sfvc.psfvcb);
RELEASE(sfvc.pshf);
HRONFAIL(L"CMyShellFolder::CreateViewObject");
}
From the first site everything works fine, but then I noticed a few unclear moments:
Context menu is not the same. "New" and "Properties" are missed.
Pure context menu
Can't rename folder. New name is not applied.
I tried to create CM in different way:
{
HKEY result;
LSTATUS st = RegOpenKeyEx(HKEY_CLASSES_ROOT, L"Directory\\Background", NULL, KEY_QUERY_VALUE, &result); // just check if it exists
if (st == ERROR_SUCCESS)
{
aKeys[cKeys] = result;
cKeys++;
}
}
DEFCONTEXTMENU dcm =
{
hwndOwner,
NULL,
NULL, // _spidl,
static_cast<IShellFolder2 *>(this),
cidl,
rgpidl,
NULL,
cKeys,
aKeys
};
hr = SHCreateDefaultContextMenu(&dcm, riid, ppv);
And "New" item appeared(still no "Properties") but didn't work and leaded explorer to crash.