Function LockFileEx 

pub unsafe extern "stdcall" fn LockFileEx(
    hFile: HANDLE,
    dwFlags: DWORD,
    dwReserved: DWORD,
    nNumberOfBytesToLockLow: DWORD,
    nNumberOfBytesToLockHigh: DWORD,
    lpOverlapped: LPOVERLAPPED,
) -> BOOL