Thanks for your reply.

In fact, I want to use Mappoint in a commercial application, so it's better if the logo doesn't appears.
But how to intercept message in Mappoint (BeforeClick, AfterRedraw)? All exemples I found are in VB or C# not in C++ (They is a topic for this subjet but no solution has been found). In fact with the AfterRedraw event I can hide the logo with my self logo.