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rasenumentries (rasapi32)

C# Signature:

[DllImport("rasapi32.dll", SetLastError=true,CharSet=CharSet.Auto)]
static extern uint RasEnumEntries(
    IntPtr reserved,
    IntPtr lpszPhonebook,
    [In,Out] RASENTRYNAME[] lprasentryname,
    ref int lpcb,
    ref int lpcEntries);

VB Signature:

<DllImport("rasapi32.dll", EntryPoint:="RasEnumEntries", CharSet:=CharSet.Auto)> _
Private Shared Function RasEnumEntries( _
     ByVal reserved As String, _
     ByVal lpszPhoneBook As String, _
     ByVal lpRasEntryName As IntPtr, _
     ByRef lpc As Int32, _
     ByRef lpcEntries As Int32) As ReturnCodes
End Function

User-Defined Types:




Tips & Tricks:

    const int MAX_PATH = 260;
    const int RAS_MaxEntryName = 256;

    struct RASENTRYNAME {
        public int     dwSize;
        [MarshalAs(UnmanagedType.ByValTStr,SizeConst=RAS_MaxEntryName + 1)]
        public string    szEntryName;
        public int     dwFlags;     
        [MarshalAs(UnmanagedType.ByValTStr,SizeConst=MAX_PATH + 1)]
        public string    szPhonebook;

Sample Code:

    using System;
    using System.Runtime.InteropServices;

    class RasEnumEntriesSample
    const int MAX_PATH = 260;
    const int RAS_MaxEntryName = 256;

    [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Auto)]
        public int dwSize;
        [MarshalAs(UnmanagedType.ByValTStr, SizeConst = RAS_MaxEntryName + 1)]
        public string szEntryName;
        public int dwFlags;
        [MarshalAs(UnmanagedType.ByValTStr, SizeConst = MAX_PATH + 1)]
        public string szPhonebook;

    [DllImport("rasapi32.dll", SetLastError = true, CharSet = CharSet.Auto)]
    static extern uint RasEnumEntries(IntPtr reserved, IntPtr lpszPhonebook,
        [In, Out] RASENTRYNAME[] lprasentryname, ref int lpcb, ref int lpcEntries);

    static void Main(string[] args)
        int cb = Marshal.SizeOf(typeof(RASENTRYNAME)), entries = 0;
        RASENTRYNAME[] entryNames = new RASENTRYNAME[1];
        entryNames[0].dwSize = Marshal.SizeOf(typeof(RASENTRYNAME));
        //Get entry number
        uint nRet = RasEnumEntries(IntPtr.Zero, IntPtr.Zero, entryNames, ref cb, ref entries);
        if (entries == 0) return;
        string[] _EntryNames = new string[entries];
        entryNames = new RASENTRYNAME[entries];
        for (int i = 0; i < entries; i++)
        entryNames[i].dwSize = Marshal.SizeOf(typeof(RASENTRYNAME));

        nRet = RasEnumEntries(IntPtr.Zero, IntPtr.Zero, entryNames, ref cb, ref entries);
        for (int i = 0; i < entries; i++)
        _EntryNames[i] = entryNames[i].szEntryName;


Alternative Managed API:


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