return nil, err
	}
	return &a[0], nil
}

// UTF16PtrToString takes a pointer to a UTF-16 sequence and returns the corresponding UTF-8 encoded string.
// If the pointer is nil, it returns the empty string. It assumes that the UTF-16 sequence is terminated
// at a zero word; if the zero word is not present, the program may crash.
func UTF16PtrToString(p *uint16) string {
	if p == nil {
		return ""
	}
	if *p == 0 {

			maxLen += 3
		}
	}
	buf := decodeWTF16(s, make([]byte, 0, maxLen))
	return unsafe.String(unsafe.SliceData(buf), len(buf))
}

// utf16PtrToString is like UTF16ToString, but takes *uint16
// as a parameter instead of []uint16.
func utf16PtrToString(p *uint16) string {
	if p == nil {
		return ""
	}
	end := unsafe.Pointer(p)
	n := 0
	for *(*uint16)(end) != 0 {

	var sddl *uint16
	err := convertSecurityDescriptorToStringSecurityDescriptor(sd, 1, 0xff, &sddl, nil)
	if err != nil {
		return ""
	}
	defer LocalFree(Handle(unsafe.Pointer(sddl)))
	return UTF16PtrToString(sddl)
}

// ToAbsolute converts a self-relative security descriptor into an absolute one.
func (selfRelativeSD *SECURITY_DESCRIPTOR) ToAbsolute() (absoluteSD *SECURITY_DESCRIPTOR, err error) {