How to delete process image file?

I want to delete an executable file while it is executing itself on Windows. I don't think that'll do any harm on the process as the same can be done by executing '.exe' from USB and then removing it - which doesn't affect the process in anyway.

I tried the most simple way without a luck:

extern wchar_t *pExePath;

DeleteFileW(pExePath);

Then I tried using native API:

UNICODE_STRING name;

static wchar_t strdrvPrefis [] {L"\\??\\"};

static wchar_t strObjectName[MAX_PATH];

name.Length = (name.MaximumLength = wcslen(pExePath) * sizeof(wchar_t) + (sizeof(strdrvPrefis) - sizeof(wchar_t)));

name.Buffer = strObjectName;

OBJECT_ATTRIBUTES objFile{};

objFile.Length = sizeof(OBJECT_ATTRIBUTES);

objFile.ObjectName = &name;

wcscat(strObjectName, strdrvPrefis);

wcscat(strObjectName, pExePath);

NtDeleteFile(&objFile);

Which fails with ACCES_DENIED if I rember corectly.

Then I tried 'NtFsControlFile' but without success too:

HANDLE hFile;

IO_STATUS_BLOCK info;

NTSTATUS RetNt = NtOpenFile(&hFile, FILE_READ_DATA | FILE_WRITE_DATA, &objFile, &info, 0, FILE_NON_DIRECTORY_FILE | FILE_RANDOM_ACCESS | FILE_OPEN_REPARSE_POINT | FILE_NO_INTERMEDIATE_BUFFERING);

RetNt = NtFsControlFile(hFile, nullptr, nullptr, nullptr, &info, 0x000900A0 /*FSCTL_DELETE_OBJECT_ID*/, nullptr, 0, nullptr, 0);

NtClose(hFile);

Right now the above snippet will fail at 'NtOpenFile'. If I remove 'FILE_WRITE_DATA' from it's second argument then 'NtFsControlFile' will fail with 'STATUS_ACCESS_DENIED'.

Any ideas how to achieve this?

I'm using VC++ 2013.