C# Definition:

    [Guid("148BD528-A2AB-11CE-B11F-00AA00530503"),InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]
    public interface IEnumWorkItems
    {
    int Next(uint celt, out IntPtr names,out uint namecount);
    int Skip(uint celt);
    int Reset() ;
    int Clone([MarshalAs(UnmanagedType.IUnknown)] out object EnumWorkItems);
    };

Helper Code

    using System;
    using System.Collections.Generic;
    using System.Runtime.InteropServices;

    static public List<string> TaskList(ITaskScheduler taskscheduler)
    {
    object obj;

    taskscheduler.Enum(out obj);

    IEnumWorkItems enumerator = obj as IEnumWorkItems;
    uint       nameCount;
    IntPtr     namePtr;
    List<string>   list       = new List<string>();

    while (enumerator.Next(1, out namePtr, out nameCount) == 0 && nameCount == 1)
    {
        IntPtr name = Marshal.ReadIntPtr(namePtr);

        list.Add(Marshal.PtrToStringUni(name));

         Marshal.FreeCoTaskMem(namePtr);
    }

    return list;
    }

VB Definition:

<ComImport> _
<Guid("TODO")> _
'TODO: Insert <InterfaceType(ComInterfaceType.InterfaceIsIUnknown)> _ if this doesn't derive from IDispatch
Interface IEnumWorkItems
   TODO
End Interface

User-Defined Types:

None.

Notes:

None.