Hi Mauro, I wrote an app that used Mappoint some years ago, so I'm a little vague on details, but with that disclaimer my suggestions.
Firstly, don't use an OLE container. Instead, import the Mappoint type library, this gives you nice Delphi native wrappers for the objects and types defined/provided by Mappoint, it's much easier and friendlier to use than OLE. (Click "Project"->"Import Type Library" and find the "Microsoft Mappoint 13 Object Libary", and import it. You don't have to install it directly, just create the unit if you like, then use it in your app.) Secondly, maybe further wrap up Mappoint to isolate what you want from it. As example, I posted a little wrapper unit I wrote from that app on pastebin (The functions were being called from a multi-threaded context hence the critical section to help ensure sanity, I can't remember anymore the types of issues I had without that protection, anyway you may want to remove that if it's not useful/relevant to you), anyway it should give you some ideas of how to use Mappoint while keeping everything tidy: http://pastebin.com/q3tJT6gA HTH, Walter
