Hi,

That dialog is a property editor, associated with the Brush class using the Editor attribute. It seems the PropertyGrid control uses the following code to display property editors:

IUIService service = (IUIService) this.GetService(typeof(IUIService));
try
{
     if (service != null)
     {
           service.ShowComponentEditor(objectToEdit, this);
     }
}

I guess objectToEdit should be the Box.Brush. There is a lot more code there - so if the code above does not work, use the .NET Reflector tool to look at the PropertyGrid.OnViewButtonClickPP() method for other possible ways to display editors.

Stoyan