CWnd::SendMassage()是线程安全的吗？

[jdgdf566]

如果多个工作线程都调用同一个CWnd对象的SendMassage函数，会不会有问题？

[用户 昵称]

感觉不会有问题，俺跨窗口操作，无论是前台还是线程，都是这个，各人工程不同，我没在sendmessage上遇到过问题。

[牧童吃五谷]

肯定出问题，记得不能在不同线程调用SendMessage(...)，但可以采用PostMessage(...)。 对于没有复杂处理交换过程的程序（如没有网络通讯、DCOM通讯、剪贴板处理等等）可能运气好，短时间内问题可能没有暴露出来，但程序实际是错误的。

[fhw217]

我测试过，多线程Send

[珍惜生命远离CPP]

线程安全的.

[fhw217]

我测试过，多线程SendMessage或者和PostMessage混合发送消息都没有问题。

[schlafenhamster]

If the specified window was created by the calling thread, the window procedure is called immediately as a subroutine. If the specified window was created by a different thread, the system switches to that thread and calls the appropriate window procedure. Messages sent between threads are processed only when the receiving thread executes message retrieval code. The sending thread is blocked until the receiving thread processes the message.