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   源码介绍

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获取设置显示器的亮度，对比度等参数

static BOOL CALLBACK MonitorEnum(HMONITOR hMon, HDC hdc, LPRECT lprcMonitor, LPARAM pData)
{
    cout << "hmonitor:" << hMon << endl;

    MONITORINFOEX mi;
    mi.cbSize = sizeof(mi);

    GetMonitorInfo(hMon, (LPMONITORINFO)&mi);

    wcout << "deviceName: " << mi.szDevice << endl;

    DWORD cPhysicalMonitors;
    BOOL bSuccess = GetNumberOfPhysicalMonitorsFromHMONITOR(hMon, &cPhysicalMonitors);
    cout << "GetNumber: " << bSuccess << ", number of physical monitors: " << cPhysicalMonitors << endl;

    LPPHYSICAL_MONITOR pPhysicalMonitors = (LPPHYSICAL_MONITOR)malloc(cPhysicalMonitors * sizeof(PHYSICAL_MONITOR));
    if (pPhysicalMonitors != NULL)
    {
        bSuccess = GetPhysicalMonitorsFromHMONITOR(hMon, cPhysicalMonitors, pPhysicalMonitors);
        cout << "GetPhysicalMonitor: " << bSuccess << endl
            << "Handle: " << pPhysicalMonitors->hPhysicalMonitor << endl
            << "Description: ";
        wcout << (WCHAR*)(pPhysicalMonitors->szPhysicalMonitorDescription) << endl;

        cout << (pPhysicalMonitors->hPhysicalMonitor) << endl;
        if (bSuccess) {
            BYTE vcpCode = 0xD6;
            //bSuccess = SetVCPFeature(pPhysicalMonitors->hPhysicalMonitor, vcpCode, 0x1);
            bSuccess = SetMonitorBrightness(pPhysicalMonitors->hPhysicalMonitor, 60);
            cout << "SetMonitorBrightness:" << bSuccess << endl;

            //try to get edid
            int len = sizeof(DWORD);
            cout << len << endl;
            vcpCode = 0xDF;
            DWORD curValue;
            DWORD maxValue;
            LPMC_VCP_CODE_TYPE vcpCodeType = (LPMC_VCP_CODE_TYPE)malloc(sizeof(MC_VCP_CODE_TYPE));
            memset(vcpCodeType, 0, sizeof(MC_VCP_CODE_TYPE));
            bSuccess = GetVCPFeatureAndVCPFeatureReply(pPhysicalMonitors->hPhysicalMonitor, vcpCode, vcpCodeType, &curValue, &maxValue);
            cout << "GetVCPFeatureAndVCPFeatureReply:" << bSuccess << endl;

            DWORD dwStringLength = 0;
            bSuccess = GetCapabilitiesStringLength(pPhysicalMonitors->hPhysicalMonitor, &dwStringLength);
            if (bSuccess) {
                LPSTR pCapabilitiesString = (LPSTR)malloc(dwStringLength);
                if (pCapabilitiesString) {
                    bSuccess = CapabilitiesRequestAndCapabilitiesReply(pPhysicalMonitors->hPhysicalMonitor, pCapabilitiesString, dwStringLength);
                    if (bSuccess) {
                        std::string strCapabilities = pCapabilitiesString;
                        std::cout << strCapabilities << std::endl << std::endl;
                    }
                }
            }
        }

        DestroyPhysicalMonitors(cPhysicalMonitors, pPhysicalMonitors);
        free(pPhysicalMonitors);
    }
    cout << "---------------------------------------" << endl;

    return TRUE;
}