Thank you for the reply,

unfortionatly the property grid shows nothing at all when I return an
object.

I have a class defined somthing like

public class Item
{
   private string _Name = string.empty;
   public string Name
   {
       get
       {
           return _Name;
       }
       set
       {
           _Name = vakue;
       }
   }
}

Then in ISelectionContainer.CountObjects(uint dwFlags, out uint pc)  I set
pc = 1.
In ISelectionContainer.GetObjects(uint dwFlags, uint cObjects, object[]
apUnkObjects) I set apUnkObjects[0] = item where item is of type Item.

As I said, the property grid shows nothing, not even a name in the object
drop down.

I guess that the relfection mechanism only applies when a ComponentEditor-
derived editor is used. What the raw IDE uses seems to be an Acrtive-X
property page.