Sharepoint Webpart Properties / Rich text box? - sharepoint

Question

Is it possible to make a String in a web part properties editable with a rich text box (to be able to use the Bold, etc.) ?
UPDATE / SOLUTION
The 1st class is the "Custom property" that should appear in the toolbar
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using Microsoft.SharePoint.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI;
using System.Web.UI.WebControls;
using Microsoft.SharePoint;
namespace MyCustomProperty
{
public class RichTextToolbarProperty : Microsoft.SharePoint.WebPartPages.ToolPart
{
InputFormTextBox textBox;
Panel toolPartPanel;
protected override void CreateChildControls()
{
toolPartPanel = new Panel();
toolPartPanel.GroupingText = "Default text here";
textBox = new InputFormTextBox();
textBox.TextMode = TextBoxMode.MultiLine;
textBox.Rows = 10;
textBox.RichText = true;
textBox.RichTextMode = SPRichTextMode.FullHtml;
BasePublicationWebPart wp = (BasePublicationWebPart)this.ParentToolPane.SelectedWebPart;
textBox.Text = wp.DefaultText;
toolPartPanel.Controls.Add(textBox);
Controls.Add(toolPartPanel);
base.CreateChildControls();
}
public override void ApplyChanges()
{
BasePublicationWebPart wp = (BasePublicationWebPart)this.ParentToolPane.SelectedWebPart;
wp.DefaultText = textBox.Text;
}
}
}
The 2nd class is the WebPart :
using System;
using System.Data;
using System.Text;
using System.Collections.Generic;
using System.Web.UI;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.WebControls;
using System.ComponentModel;
using Microsoft.SharePoint;
using Microsoft.SharePoint.Utilities;
using Microsoft.SharePoint.WebPartPages;
namespace MyWebPart
{
public abstract class BasePublicationWebPart : Microsoft.SharePoint.WebPartPages.WebPart
{
public string DefaultText
{
get
{
return _defaultText;
}
set { _defaultText = value; }
}
public override ToolPart[] GetToolParts()
{
ToolPart[] allToolParts = new ToolPart[3];
WebPartToolPart standardToolParts = new WebPartToolPart();
CustomPropertyToolPart customToolParts = new CustomPropertyToolPart();
allToolParts[0] = standardToolParts;
allToolParts[1] = customToolParts;
allToolParts[2] = new MyCustomProperty.RichTextToolbarProperty();
return allToolParts;
}
// ... some usual web part code should go here ... ///

Answer 1

Yes it is, you might want to inspect, how the "Custom Content Editor Web Part" is built: http://www.codeproject.com/KB/sharepoint/Custom_CEWP_4_SharePoint.aspx