Hi Andrey,

Yes, when we implement IExtenderProvider in a class, we must define a set
of properties that the extender can provide to other components. The
properties are really methods because they take an extra parameter that
specifies the component to apply the property to.

If you want to associate a custom type editor to the properties that are
provided to other components, just associate the EditorAttribute to the
GetPropertyName method. In your scenario, it is GetImagePosition method.
The following is a sample.

[Editor(typeof(MyCustomTypeEditor))]
public object GetImagePosition()
{
         .....
}

Thus, select a component which has the extender properties on the form at
design time, and you will see your custom type editor is available in the
extender properties nodes in the Properties Explorer.

Hope this helps.
If you have anything unclear, please feel free to let me know.

Sincerely,
Linda Liu
Microsoft Online Community Support

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