带有0x3B代码的Windows消息
在Windows XP中注销时，系统将带有代码0x3B的消息发送到应用程序的主窗口。 它与0x11 WM_QUERYENDSESSION消息一起收到。 这是WndProc传入消息的日志：
Message processing: Id = 0x3B, wParam = -2147483637, lParam = 0, result = 0 Message processing: Id = 0x11, wParam = 0, lParam = -2147483648, result = 0 Form closing event handler. Reason:WindowsShutDown Message processed: Id = 0x11, wParam = 0, lParam = -2147483648, result = 1 Message processed: Id = 0x3B, wParam = -2147483637, lParam = 0, result = 1 Message processing: Id = 0x3B, wParam = -2147483639, lParam = 0, result = 0 Message processing: Id = 0x16, wParam = 1, lParam = -2147483648, result = 0 Form closed event handler. Reason:WindowsShutDown Message processing: Id = 0x46, wParam = 0, lParam = 1239312, result = 0 Message processed: Id = 0x46, wParam = 0, lParam = 1239312, result = 0 Message processing: Id = 0x47, wParam = 0, lParam = 1239312, result = 0 Message processed: Id = 0x47, wParam = 0, lParam = 1239312, result = 0 Message processing: Id = 0x86, wParam = 0, lParam = 0, result = 0 Message processing: Id = 0x7F, wParam = 2, lParam = 0, result = 0 Message processed: Id = 0x7F, wParam = 2, lParam = 0, result = 852077 Message processing: Id = 0x7F, wParam = 2, lParam = 0, result = 0 Message processed: Id = 0x7F, wParam = 2, lParam = 0, result = 852077 Message processed: Id = 0x86, wParam = 0, lParam = 0, result = 1 Message processing: Id = 0x6, wParam = 0, lParam = 0, result = 0 Message processed: Id = 0x6, wParam = 0, lParam = 0, result = 0 Message processing: Id = 0x1C, wParam = 0, lParam = 2620, result = 0 Message processed: Id = 0x1C, wParam = 0, lParam = 2620, result = 0 Message processing: Id = 0x8, wParam = 0, lParam = 0, result = 0 Message processed: Id = 0x8, wParam = 0, lParam = 0, result = 0 Message processing: Id = 0x2, wParam = 0, lParam = 0, result = 0 Message processed: Id = 0x2, wParam = 0, lParam = 0, result = 0 Message processing: Id = 0x82, wParam = 0, lParam = 0, result = 0 Message processed: Id = 0x82, wParam = 0, lParam = 0, result = 0
在注销期间，我的应用程序在Windows XP中存在一个错误。 它不关闭。 原因是：
Message processed: Id = 0x3B, wParam = -2147483637, lParam = 0, result = <b>3</b>
而不是1
任何想法这个消息是什么意思？ 为什么它处理不正确？
我的Google-fu显示这是一个未公开的消息 - WM_CLIENTSHUTDOWN。 这可能是有趣的，但它所做的只是将WM_QUERYENDSESSION / WM_ENDSESSION发送到窗口及其子窗口。 返回值3（MCSR_DONOTSHUTDOWN）表示该窗口或其中一个子窗口正在否决该请求。
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