BOOLEAN WINAPI RtlAreLongPathsEnabled()

CreateDirectory.cpp

#include <windows.h>
#include <atlalloc.h>
#include <atlcore.h>
#include <clocale>
#include <cstdio>

int wmain(int, PWSTR argv[])
{
	setlocale(LC_ALL, "");
	IFDYNAMICGETCACHEDFUNCTIONTYPEDEF(L"ntdll", BOOLEAN(WINAPI*)(), "RtlAreLongPathsEnabled", RtlAreLongPathsEnabled)
	{
		printf("RtlAreLongPathsEnabled()=%d\n", RtlAreLongPathsEnabled());
	}
	if (!CreateDirectoryW(argv[1], nullptr))
	{
		ATL::CHeapPtr<WCHAR> msg;
		ATLENSURE(msg.Allocate(USHRT_MAX));
		ATLENSURE(FormatMessageW(FORMAT_MESSAGE_FROM_SYSTEM, nullptr, GetLastError(), 0, msg, USHRT_MAX, nullptr));
		_putws(msg);
	}
}