C#

using mshtml; // Microsoft.mshtml PIA
using System.Runtime.InteropServices;

// import COM interface used for initialization
[  ComImport, Guid("7FD52380-4E07-101B-AE2D-08002B2EC713"),
  InterfaceType(ComInterfaceType.InterfaceIsIUnknown)] public interface IPersistStreamInit
{
  IntPtr GetClassID();
  void IsDirty();
  void Load(IntPtr pStream);
  void Save(IntPtr pStream, bool fClearDirty);
  long GetSizeMax();
  void InitNew();
}

// somewhere in your code :
{
  mshtml.HTMLDocumentClass doc = new mshtml.HTMLDocumentClass();

  IPersistStreamInit pS = (IPersistStreamInit) doc;
  pS.InitNew();
			
  doc.createElement("<a href='http://www.codeproject.com'>link</a>");
  MessageBox.Show ("nb elements = " + doc.all.length);

  ...
}

private string userName;<br />
private string password;<br />
private string databaseName;

public string UserName<br />
{<br />
   get<br />
     {<br />
        return userName;<br />
     }<br />
   set<br />
     {<br />
        userName=value<br />
     }<br />
}<br />
<br />
public string Password<br />
{<br />
   get<br />
     {<br />
        return password;<br />
     }<br />
   set<br />
     {<br />
        password=value<br />
     }<br />
}<br />
<br />
public string DatabaseName<br />
{<br />
   get<br />
     {<br />
        return databaseName;<br />
     }<br />
   set<br />
     {<br />
        databaseName=value<br />
     }<br />
}

private void button1_Click(object sender, System.EventArgs e)<br />
{<br />
   this.UserName=textBox1.Text;<br />
   this.Password=textBox2.Text;<br />
   this.DatabaseName=textBox3.Text;<br />
}

frmLogon Logon=new frmLogon;<br />
<br />
if(Logon.ShowDialog()==DialogResult.Ok)<br />
{<br />
<br />
//Displays the results of the dialog in a textbox in the main form<br />
this.myTextBox=Logon.UserName +Logon.Password +Logon.DataBaseName<br />
}

for( int i=0 ; i < checkedListBox1.Count; i++ ) <br />
{ <br />
  checkedListBox1.SetItemChecked(i, false); <br />
}  

Don't and drive.