C++
virtual ACDBCORE2D_PORT const ACHAR * primaryClientForMapFileCallback();
Description
Called by an application to find out which is the primary client installed at that moment. When you register as primary, make sure that you check the currently installed primary client first. Make sure you have worked out what the client's behavior should be when there's conflict.
If there's a primary client already, and you register as primary client, the old primary client will be called only if the new primary client doesn't handle it. If you remove your callback, then the old one becomes primary client again.