How do you do an About box on an ActiveX control?

You know, so that it appears as an item in the properties window that you can double click to bring up the about box...
Code:
+-------------------------------------+
| Properties - Control                |
+-------------------------------------+
| Control UserControl                |
+=====================================+
| Alphabetic | Catagorized |          |
+=====================================+
| (About)       |                   … |   <-- How do ya do
+-------------------------------------+       that bit?
| (Name)        |                     |
+-------------------------------------+
| Align         | 0 - None            | 
+-------------------------------------+
|                                     |

And so on...