USER_INFO = 13,

    ByRef buf As USER_INFO_1, _

USER_INFO_1

If the method will only be used with a single user info level, then the userInfo parameter can be simplified to be ref USER_INFO_# userInfo where # is the level you intend to pass.

       Private Structure USER_INFO_1

    ByRef buf As USER_INFO_1, _

    Dim NewUser As New USER_INFO_1

        Dim Users(EntriesRead) As USER_INFO_0

        Users(i) = CType(Marshal.PtrToStructure(iter, GetType(USER_INFO_0)), USER_INFO_0)

        iter = New IntPtr(iter.ToInt32 + Marshal.SizeOf(GetType(USER_INFO_0)))

            USER_INFO_0 anUser = (USER_INFO_0)Marshal.PtrToStructure(iter, typeof(USER_INFO_0));

            iter = iter + Marshal.SizeOf(typeof(USER_INFO_0));

    public struct USER_INFO_10

                // Create an new instance of the USER_INFO_1 struct

                USER_INFO_10 objUserInfo10 = new USER_INFO_10();

                    objUserInfo10 = (USER_INFO_10) Marshal.PtrToStructure(bufPtr, typeof(USER_INFO_10) );

    Public Structure USER_INFO_10

        Dim objUserInfo10 As New USER_INFO_10

        objUserInfo10 = CType(Marshal.PtrToStructure(bufPtr, GetType(USER_INFO_10)), USER_INFO_10)

        ref USER_INFO_1003 buf,

    public struct USER_INFO_1003 {

        USER_INFO_1003 o = new USER_INFO_1003();

    public struct WKSTA_USER_INFO_0

    public struct WKSTA_USER_INFO_1

        Type tWui1 = typeof(WKSTA_USER_INFO_1);

        WKSTA_USER_INFO_1 wui1;

                wui1 = (WKSTA_USER_INFO_1)Marshal.PtrToStructure(pstruct, tWui1);

public struct WKSTA_USER_INFO_1

            Dim wksInfo As WKSTA_USER_INFO_1 = Marshal.PtrToStructure(lpBuffer, GetType(WKSTA_USER_INFO_1))

    WKSTA_USER_INFO_1 wksInfo;

        wksInfo = (WKSTA_USER_INFO_1)Marshal.PtrToStructure(

            buffer, typeof(WKSTA_USER_INFO_1));

    public struct USER_INFO_0

    Public Structure USER_INFO_0

Also USER_INFO_1, USER_INFO_23

        public struct USER_INFO_1

What's with all this unmanaged nonsense? USER_INFO_0, USER_INFO_23, and many other structures on this site, manage not to resort to such ugliness.

                USER_INFO_1[] Users = new USER_INFO_1[EntriesRead];

                    Users[i] = (USER_INFO_1)Marshal.PtrToStructure(iter, typeof(USER_INFO_1));

                    iter = (IntPtr)((int)iter + Marshal.SizeOf(typeof(USER_INFO_1)));

    /// USER_INFO_23 Struct for NetUserSetInfo/NetUserGetInfo

    private struct USER_INFO_23 {

Private Structure USER_INFO_23

    public struct USER_INFO_4

Structure USER_INFO_4

        public struct USER_INFO_0

Structure USER_INFO_0

        public struct USER_INFO_1

Structure USER_INFO_1

    public struct USER_INFO_2

Structure USER_INFO_2

        public struct USER_INFO_3

      Public Structure USER_INFO_3

    /// USER_INFO_23 Struct for NetUserSetInfo/NetUserGetInfo

    private struct USER_INFO_23 {

    Private Structure USER_INFO_23

THIS NODE IS MISFILED! There is no USE_INFO_23, there is only USER_INFO_23.

    /// USER_INFO_23 Struct for NetUserSetInfo/NetUserGetInfo

    private struct USER_INFO_23 {

    Private Structure USER_INFO_23

THIS NODE IS MISFILED! There is no USE_INFO_23, there is only USER_INFO_23.

    /// USER_INFO_23 Struct for NetUserSetInfo/NetUserGetInfo

    private struct USER_INFO_23 {

    Private Structure USER_INFO_23

THIS NODE IS MISFILED! There is no USE_INFO_23, there is only USER_INFO_23.

public struct WKSTA_USER_INFO_1

Structure WKSTA_USER_INFO_1