mark_directory_as_case_sensitive_sdk.cpp

#define WIN32_LEAN_AND_MEAN
#define WIL_SUPPRESS_EXCEPTIONS
#include <windows.h>
#include <cstdio>
#include <cstdlib>
#include <wil/resource.h>

int wmain(int, PWSTR argv[])
{
	wil::unique_hfile d(CreateFileW(argv[1], FILE_WRITE_ATTRIBUTES, FILE_SHARE_READ | FILE_SHARE_WRITE, nullptr, OPEN_EXISTING, FILE_FLAG_BACKUP_SEMANTICS | FILE_FLAG_OPEN_REPARSE_POINT, nullptr));
	if (!d)
	{
		fprintf(stderr, "CreateFile %08lx\n", GetLastError());
		return EXIT_FAILURE;
	}
	FILE_CASE_SENSITIVE_INFORMATION file_cs = { FILE_CS_FLAG_CASE_SENSITIVE_DIR };
	if (!SetFileInformationByHandle(d.get(), FileCaseSensitiveInfo, &file_cs, sizeof file_cs))
	{
		fprintf(stderr, "SetFileInformationByHandle %08lx\n", GetLastError());
		return EXIT_FAILURE;
	}
}