如何在.NET（C＃）中扩展COM控制？

Question

I am using MapPoint COM in small tool for work. It takes addresses from text file and imports as stops to MapPoint.

As far as I know there are not many features or methods I can work with to get more out of MapPoint COM. Which brings me to a questions, how, if I may, extend COM to get more out of it?

Here are few ideas what I mean by extend

• External list (DataSource) for Waypoints
• Custom events for MapPoint.ActiveMap.ActiveRoute.Waypoints (ie when waypoint added, deleted, selection changed, etc) {not important if custom List can be set as datasource, see aove}
• Custom MapPoint.Waypoint Objects

Answer 1

Write a wrapper COM control or library which exposes the MapPoint COM object's features as well as new features you write yourself.

Edit: Here's more on wrapper classes: What is a wrapper class?

Answer 2

@Richard Brightwell's wrapper classes might help provide some of what you want but I think overall you are going to be limited. As @Hans Passant says, only Microsoft can change the innards of the MapPoint application.

It is unclear what you mean by your waypoint data source, but you could easily write code that reads waypoint data from somewhere (anywhere) and then uses it to create waypoints (and/or pushpins) one at a time, in MapPoint.

You are never going to be able to add your own event types, unless your wrapper classes fire intermediate events. Eg. Class method X might do X. X contains steps a,b,c and step b fires an event in your code .