Спасибо за предложение, из-за исправления.

Вот, что накопал, я в MSDN. Цитата:


Accessing MFC Objects from Non-MFC Threads


If you have a multithreaded application that creates a thread in a way other than using aCWinThread object, you cannot access other MFC objects from that thread. In other words, if you want to access any MFC object from a secondary thread, you must create that thread with one of the methods described in the Multithreading: Creating User-Interface Threads or Multithreading: Creating Worker Threads articles. These methods are the only ones that allow the class library to initialize the internal variables necessary to handle multithreaded applications.

Этим предложением все и сказано.