C#

<br />
using System;<br />
using System.Collections.Generic;<br />
using System.Text;<br />
using System.Runtime.InteropServices;<br />
<br />
namespace CheckDate<br />
{<br />
    [Guid("1AD0462D-4FA2-4072-B63B-8B1D88212389")]<br />
        <br />
    public class CheckDate<br />
    {<br />
        <br />
        <br />
        private int _day;<br />
        private int _month;<br />
        private int _year;<br />
<br />
        public int day<br />
        {<br />
            set { _day = value; }<br />
           <br />
        }<br />
<br />
        public int month<br />
        {<br />
            set { _month = value; }<br />
       <br />
        }<br />
<br />
        public int year<br />
        {<br />
            set { _year = value; }<br />
      <br />
        }<br />
    <br />
        public bool checkDate()<br />
        {<br />
            DateTime newDateTime;<br />
            string dateString;<br />
            dateString = _day.ToString() + _month.ToString() + _year.ToString();<br />
            if (DateTime.TryParse(dateString,out newDateTime))<br />
                return true;<br />
            else<br />
                return false;<br />
        }<br />
        public void clear()<br />
        {<br />
            _day = 0;<br />
            _month = 0;<br />
            _year = 0;<br />
        }<br />
<br />
    }<br />
}<br />

[Guid("03AD5D2D-2AFD-439f-8713-A4EC0705B4D9")]
    interface ICheckDate
    {
        void DoThis();
        void DoThat();
    }

[ClassInterface(ClassInterfaceType.None), Guid("1AD0462D-4FA2-4072-B63B-8B1D88212389")]
public class CheckDate : ICheckDate
{
   ...
}

<code>
using System;
using System.Collections.Generic;
using System.Text;
using System.Runtime.InteropServices;

namespace CheckDate
{
    [Guid("2BE56F71-BC00-4736-8D85-9A3C6438CDA7")]
    interface ICheckDate
    {
        bool checkDate();
        void clear();
    }

    [ClassInterface(ClassInterfaceType.None), Guid("1AD0462D-4FA2-4072-B63B-8B1D88212389")]  
    public class CheckDate : ICheckDate
    {
        
        public int day
        {
            set { _day = value; }
           
        }

        public int month
        {
            set { _month = value; }
       
        }

        public int year
        {
            set { _year = value; }
      
        }
    
        public bool checkDate()
        {
            DateTime newDateTime;
            string dateString;
            dateString = _day.ToString() + _month.ToString() + _year.ToString();
            if (DateTime.TryParse(dateString,out newDateTime))
                return true;
            else
                return false;
        }
        public void clear()
        {
            _day = 0;
            _month = 0;
            _year = 0;
        }

    }
}

</code>

<code>
Microsoft (R) .NET Framework Assembly Registration Utility 2.0.50727.42
Copyright (C) Microsoft Corporation 1998-2004.  All rights reserved.

Types registered successfully
</code>

<code>
Checkdate.tlb is not an executable file and no registration helper is registered for this file type.
</code>

Judah Himango wrote:

No idea, but it's almost certainly due to a bug in your code; this would otherwise not happen. Can you post some relevant code snippets?

<br />
//This is whre i launch the thread<br />
...<br />
Thread worker = new Thread(new ParameterizedThreadStart(ThreadOperation));<br />
worker.IsBackground = true;<br />
worker.Start(dataobj);<br />
m_dlgThreadProgress.ShowDialog(this);<br />
...<br />
<br />
private void ThreadOperation(object obj)<br />
        {<br />
            DataObj dataobj = (DataObj)obj;<br />
            new ThreadObj(this).TimeConsumingOperation(dataobj);<br />
            Invoke(m_delegateCloseProgressDialog);<br />
            Invoke(m_delegateListViewUpdate, dataobj);<br />
            System.Diagnostics.Debug.WriteLine((DateTime.Now - m_dtStartLoadingTime).ToString());<br />
        }<br />
<br />