Creating A Local User With The Option "User Must Change Password At Next Logon" Set

I am currently creating a tool that can manage local user accounts on Windows-PCs. I am using the functions described on

this MSDN page ; and after some struggling, I got most of them to work.

Unluckily, I haven't found a way to set the option "User must change password at next logon" while creating a new user account. I use the

NetUserAdd -Function to create the new user. I set the level to 1 and supply a

USER_INFO_1 -Structure . This structure accepts flags, and the flag UF_PASSWORD_EXPIRED seems to be exactly what I want - but when I set it, the user can log on without changing the password first...

I'm developing on Windows 7 Ultimate 64-Bit using Visual Studio 2010 Express.

Here's my code:

#Region "Constants"
Public Const UF_PASSWORD_EXPIRED As Integer = &H800000
Public Const USER_PRIV_USER As Integer = 1

[Code].....