如果您的项目包含ActiveX控件，则应通过编写该控件的接口与其进行对话，而不要发送消息做到这一点.如果它有自己的消息循环，则可以向它发送消息.

If your project contains an ActiveX control, you should talk to it through the interface that you write to it, not by sending messages to it. If it has it''s own message loop going on, then you could presumably send it messages.