CreateFile2 returns access denied error in Windows 8 - windows-8

Question

I have written the following lines of code to open a file under InstalledFolder directory:
Platform::String^ locationPath = Platform::String::Concat(Package::Current->InstalledLocation->Path, "\\Assets\\Logo.png");
CREATEFILE2_EXTENDED_PARAMETERS extendedParams = {0};
extendedParams.dwSize = sizeof(CREATEFILE2_EXTENDED_PARAMETERS);
extendedParams.dwFileAttributes = FILE_ATTRIBUTE_NORMAL;
extendedParams.dwFileFlags = FILE_FLAG_SEQUENTIAL_SCAN;
extendedParams.dwSecurityQosFlags = SECURITY_ANONYMOUS;
extendedParams.lpSecurityAttributes = nullptr;
extendedParams.hTemplateFile = nullptr;
Wrappers::FileHandle file(
CreateFile2(
locationPath->Data(),
GENERIC_READ,
0,
OPEN_EXISTING,
&extendedParams
)
);
DWORD e = GetLastError();
if (file.Get() == INVALID_HANDLE_VALUE)
{
throw ref new Platform::FailureException();
}
The CreateFile2 returns access denied error. Can anyone please help me out?
As suggested by JP Alioto, I have tried with WinRT File I/O as the following
create_task(StorageFile::GetFileFromApplicationUriAsync(ref new Windows::Foundation::Uri("ms-appx:///Assets/Logo.png")))
.then([=](StorageFile^ f)
{
auto p = create_task(f->OpenAsync(FileAccessMode::Read));
p.wait();
});
I still get the following error at p.wait():
An invalid parameter was passed to a function that considers invalid parameters fatal
Thanks,

Answer 1

You are passing 0 for dwShareMode. The documentation for CreateFile2 says that this value...
Prevents other processes from opening a file or device if they request delete, read, or write access. Exclusive access to a file or directory is only granted if the application has write access to the file.
You do not have write access to files within the package, which is why you get the access denied error. You need to set the share mode to FILE_SHARE_READ.