Having defined an icon property on my usercontrol as show below,
I can set it just fine using the PropertyGrid. But for some reason I
cannot delete it, once it has been set, i.e. mark the "(icon)" text
and pressing the Delete button, as is the case for standard
"BackgroundImage" properties, etc.

Am I missing an attribute on the property so the Delete button
will assign "Nothing" to the Icon property?!?

TIA,

Joergen Bech

---snip---

   Private _HeaderIcon As System.Drawing.Icon

   Public Property HeaderIcon() As System.Drawing.Icon
       Get
           Return Me._HeaderIcon
       End Get
       Set(ByVal Value As System.Drawing.Icon)
           Me._HeaderIcon = Value
           Me.Invalidate()
       End Set
   End Property