如何在 CWinApp 中获取 WM_POWERBROADCAST 消息?

Then you will need to add the message handler function along with the class definition change to declare the member function for the message handler so that you can check the wParam variable for the message type as in this skeleton. Remember to return an LRESULT value indicating if you handled the message or not.

// Handle the WM_POWERBROADCAST message to process a message concerning power management
// such as going to Sleep or Waking Up.
LRESULT CFrameworkWndApp::OnPowerMsgRcvd(WPARAM wParam, LPARAM lParam)
{
    LRESULT  lrProcessed = 0;  // indicate if message processed or not

    switch (wParam) {
        case PBT_APMPOWERSTATUSCHANGE:
            TRACE0("PBT_APMPOWERSTATUSCHANGE  received
");
            break;
        case PBT_APMRESUMEAUTOMATIC:
            TRACE0("PBT_APMRESUMEAUTOMATIC  received
");
            break;
        case PBT_APMRESUMESUSPEND:
            TRACE0("PBT_APMRESUMESUSPEND  received
");
            break;
        case PBT_APMSUSPEND:
            TRACE0("PBT_APMSUSPEND  received
");
            break;
    }

    // indicate if framework needs to handle message or we did ourselves.
    return lrProcessed;
}

请参阅 Microsoft 文档 - 电源管理 以及该文档的特定小节 Microsoft 文档- WM_POWERBROADCAST 消息 了解有关处理消息的详细信息.