Setting Status icon for CFAPI does not work as expected - c++

Question

I try to set the status icon of the placeholder file created with CFAPI to error. (see below)
content of folder T:
I set the error state on the file, but it does not display the error. However the error is displayed on the containing folder.
I use following code to set the error on the file (the complete code is published on github):
void SetTransferStatus(_In_ PCWSTR fullPath, _In_ SYNC_TRANSFER_STATUS status)
{
// Tell the Shell so File Explorer can display the progress bar in its view
try
{
// First, get the Volatile property store for the file. That's where the properties are maintained.
winrt::com_ptr<IShellItem2> shellItem;
winrt::check_hresult(SHCreateItemFromParsingName(fullPath, nullptr, __uuidof(shellItem), shellItem.put_void()));
winrt::com_ptr<IPropertyStore> propStoreVolatile;
winrt::check_hresult(
shellItem->GetPropertyStore(
GETPROPERTYSTOREFLAGS::GPS_READWRITE | GETPROPERTYSTOREFLAGS::GPS_VOLATILEPROPERTIESONLY,
__uuidof(propStoreVolatile),
propStoreVolatile.put_void()));
// Set the sync transfer status accordingly
PROPVARIANT transferStatus;
winrt::check_hresult(
InitPropVariantFromUInt32(
status,
&transferStatus));
winrt::check_hresult(propStoreVolatile->SetValue(PKEY_SyncTransferStatus, transferStatus));
// Without this, all your hard work is wasted.
winrt::check_hresult(propStoreVolatile->Commit());
// Broadcast a notification that something about the file has changed, so that apps
// who subscribe (such as File Explorer) can update their UI to reflect the new progress
SHChangeNotify(SHCNE_UPDATEITEM, SHCNF_PATH, static_cast<LPCVOID>(fullPath), nullptr);
//wprintf(L"Succesfully Set Transfer Progress on \"%s\" to %llu/%llu\n", fullPath, completed, total);
}
catch (...)
{
// winrt::to_hresult() will eat the exception if it is a result of winrt::check_hresult,
// otherwise the exception will get rethrown and this method will crash out as it should
wprintf(L"Failed to Set Transfer Progress on \"%s\" with %08x\n", fullPath, static_cast<HRESULT>(winrt::to_hresult()));
}
}
In addition, if I delete the file and create a new file the state will still be on error.

Answer 1

Someone pointed me to an pull request in the windows cloud mirror sample that shows how to accomplish this.
This is the code:
void Utilities::UpdateErrorOnItem(PCWSTR path, bool setError)
{
try
{
winrt::com_ptr<IShellItem2> item;
winrt::check_hresult(SHCreateItemFromParsingName(path, nullptr, IID_PPV_ARGS(item.put())));
winrt::com_ptr<IPropertyStore> propertyStore;
winrt::check_hresult(item->GetPropertyStore(GPS_READWRITE | GPS_EXTRINSICPROPERTIESONLY, IID_PPV_ARGS(propertyStore.put())));
PROPVARIANT propVar{};
if (setError)
{
propVar.vt = VT_UI4;
propVar.ulVal = static_cast<unsigned long>(E_FAIL);
winrt::check_hresult(propertyStore->SetValue(PKEY_LastSyncError, propVar));
}
else
{
// Clear by setting to empty
propVar.vt = VT_EMPTY;
winrt::check_hresult(propertyStore->SetValue(PKEY_LastSyncError, propVar));
}
winrt::check_hresult(propertyStore->Commit());
}
catch (...)
{
// winrt::to_hresult() will eat the exception if it is a result of winrt::check_hresult,
// otherwise the exception will get rethrown and this method will crash out as it should
wprintf(L"Failed to set error state with %08x\n", static_cast<HRESULT>(winrt::to_hresult()));
}