return UTF16ToString(b[:l]), nil
		}
		n = l
	}
}

// GetSystemWindowsDirectory retrieves the path to current location of the
// Windows directory, which is typically, though not always, `C:\Windows`.
func GetSystemWindowsDirectory() (string, error) {
	n := uint32(MAX_PATH)
	for {
		b := make([]uint16, n)
		l, e := getSystemWindowsDirectory(&b[0], n)
		if e != nil {
			return "", e
		}
		if l <= n {

	return
}

func GetSystemTimePreciseAsFileTime(time *Filetime) {
	syscall.Syscall(procGetSystemTimePreciseAsFileTime.Addr(), 1, uintptr(unsafe.Pointer(time)), 0, 0)
	return
}

func getSystemWindowsDirectory(dir *uint16, dirLen uint32) (len uint32, err error) {
	r0, _, e1 := syscall.Syscall(procGetSystemWindowsDirectoryW.Addr(), 2, uintptr(unsafe.Pointer(dir)), uintptr(dirLen), 0)
	len = uint32(r0)
	if len == 0 {