Windows 当前所接的屏幕检测

// ConsoleApplication1.cpp : 此文件包含 "main" 函数。程序执行将在此处开始并结束。
//#include <iostream>#include <atlstr.h>
#define _WIN32_DCOM
#include <iostream>
using namespace std;
#include <comdef.h>
#include <Wbemidl.h>
# pragma comment(lib, "wbemuuid.lib")            typedef enum _D3DKMDT_VIDEO_OUTPUT_TECHNOLOGY {D3DKMDT_VOT_UNINITIALIZED = -2,D3DKMDT_VOT_OTHER = -1,D3DKMDT_VOT_HD15 = 0,D3DKMDT_VOT_SVIDEO = 1,D3DKMDT_VOT_COMPOSITE_VIDEO = 2,D3DKMDT_VOT_COMPONENT_VIDEO = 3,D3DKMDT_VOT_DVI = 4,D3DKMDT_VOT_HDMI = 5,D3DKMDT_VOT_LVDS = 6,D3DKMDT_VOT_D_JPN = 8,D3DKMDT_VOT_SDI = 9,D3DKMDT_VOT_DISPLAYPORT_EXTERNAL = 10,D3DKMDT_VOT_DISPLAYPORT_EMBEDDED = 11,D3DKMDT_VOT_UDI_EXTERNAL = 12,D3DKMDT_VOT_UDI_EMBEDDED = 13,D3DKMDT_VOT_SDTVDONGLE = 14,
#if (DXGKDDI_INTERFACE_VERSION >= DXGKDDI_INTERFACE_VERSION_WDDM1_3_M1)D3DKMDT_VOT_MIRACAST = 15,
#endif D3DKMDT_VOT_INTERNAL = 0x80000000,D3DKMDT_VOT_SVIDEO_4PIN = D3DKMDT_VOT_SVIDEO,D3DKMDT_VOT_SVIDEO_7PIN = D3DKMDT_VOT_SVIDEO,D3DKMDT_VOT_RF = D3DKMDT_VOT_COMPOSITE_VIDEO,D3DKMDT_VOT_RCA_3COMPONENT = D3DKMDT_VOT_COMPONENT_VIDEO,D3DKMDT_VOT_BNC = D3DKMDT_VOT_COMPONENT_VIDEO
} D3DKMDT_VIDEO_OUTPUT_TECHNOLOGY;_D3DKMDT_VIDEO_OUTPUT_TECHNOLOGY GetConnectorInfo(LPCWSTR ShortDeviceID)
{_D3DKMDT_VIDEO_OUTPUT_TECHNOLOGY result = D3DKMDT_VOT_OTHER;BSTR strNetworkResource;strNetworkResource = (BSTR)L"\\\\.\\root\\WMI";HRESULT hres;hres = CoInitializeEx(0, COINIT_MULTITHREADED);if (FAILED(hres)){cout << "Failed to initialize COM library. Error code = 0x" << hex << hres << endl;cout << _com_error(hres).ErrorMessage() << endl;cout << "press enter to exit" << endl;cin.get();std::exit(1);}hres = CoInitializeSecurity(NULL,-1,                          // COM authenticationNULL,                        // Authentication servicesNULL,                        // ReservedRPC_C_AUTHN_LEVEL_DEFAULT,   // Default authenticationRPC_C_IMP_LEVEL_IMPERSONATE, // Default ImpersonationNULL,                        // Authentication infoEOAC_NONE,                   // Additional capabilitiesNULL                         // Reserved);if (FAILED(hres)){cout << "Failed to initialize security. Error code = 0x" << hex << hres << endl;cout << _com_error(hres).ErrorMessage() << endl;CoUninitialize();cout << "press enter to exit" << endl;cin.get();std::exit(1);}IWbemLocator* pLoc = NULL;hres = CoCreateInstance(CLSID_WbemLocator, 0, CLSCTX_INPROC_SERVER, IID_IWbemLocator, (LPVOID*)&pLoc);if (FAILED(hres)){cout << "Failed to create IWbemLocator object." << " Err code = 0x" << hex << hres << endl;cout << _com_error(hres).ErrorMessage() << endl;CoUninitialize();cout << "press enter to exit" << endl;cin.get();std::exit(1);}IWbemServices* pSvc = NULL;hres = pLoc->ConnectServer(_bstr_t(strNetworkResource),      // Object path of WMI namespaceNULL,                    // User name. NULL = current userNULL,                    // User password. NULL = current0,                       // Locale. NULL indicates currentNULL,                    // Security flags.0,                       // Authority (e.g. Kerberos)0,                       // Context object&pSvc                    // pointer to IWbemServices proxy);if (FAILED(hres)){cout << "Could not connect. Error code = 0x" << hex << hres << endl;cout << _com_error(hres).ErrorMessage() << endl;pLoc->Release();CoUninitialize();cout << "press enter to exit" << endl;cin.get();std::exit(1);}hres = CoSetProxyBlanket(pSvc,                        // Indicates the proxy to setRPC_C_AUTHN_WINNT,           // RPC_C_AUTHN_xxxRPC_C_AUTHZ_NONE,            // RPC_C_AUTHZ_xxxNULL,                        // Server principal nameRPC_C_AUTHN_LEVEL_CALL,      // RPC_C_AUTHN_LEVEL_xxxRPC_C_IMP_LEVEL_IMPERSONATE, // RPC_C_IMP_LEVEL_xxxNULL,                        // client identityEOAC_NONE                    // proxy capabilities);if (FAILED(hres)){cout << "Could not set proxy blanket. Error code = 0x" << hex << hres << endl;cout << _com_error(hres).ErrorMessage() << endl;pSvc->Release();pLoc->Release();CoUninitialize();cout << "press enter to exit" << endl;cin.get();std::exit(1);}IEnumWbemClassObject* pEnumerator = NULL;hres = pSvc->ExecQuery((BSTR)L"WQL", (BSTR)L"SELECT InstanceName, VideoOutputTechnology FROM WmiMonitorConnectionParams",WBEM_FLAG_FORWARD_ONLY | WBEM_FLAG_RETURN_IMMEDIATELY, NULL, &pEnumerator);if (FAILED(hres)){cout << "ExecQuery failed" << " Error code = 0x" << hex << hres << endl;cout << _com_error(hres).ErrorMessage() << endl;pSvc->Release();pLoc->Release();CoUninitialize();cout << "press enter to exit" << endl;cin.get();std::exit(1);}IWbemClassObject* pclsObj = NULL;ULONG uReturn = 0;BOOL bFound = false;while (pEnumerator){HRESULT hr = pEnumerator->Next(WBEM_INFINITE, 1, &pclsObj, &uReturn);if (0 == uReturn || FAILED(hr))break;VARIANT vtProp;CString DeviceID;hr = pclsObj->Get(L"InstanceName", 0, &vtProp, 0, 0);// Stringif (!FAILED(hr)){if ((vtProp.vt == VT_NULL) || (vtProp.vt == VT_EMPTY)){}else{DeviceID.Format(L"%s", vtProp.bstrVal);DeviceID = DeviceID.Mid(8, DeviceID.Find(L"\\", 9) - 8);bFound = DeviceID.Compare(ShortDeviceID) == 0;}}VariantClear(&vtProp);if (bFound){hr = pclsObj->Get(L"VideoOutputTechnology", 0, &vtProp, 0, 0);// Uint32if (!FAILED(hr)){if ((vtProp.vt == VT_NULL) || (vtProp.vt == VT_EMPTY))result = D3DKMDT_VOT_OTHER;else{result = (_D3DKMDT_VIDEO_OUTPUT_TECHNOLOGY)vtProp.uintVal;}}}VariantClear(&vtProp);pclsObj->Release();pclsObj = NULL;if (bFound)break;}pSvc->Release();pLoc->Release();pEnumerator->Release();if (pclsObj != NULL)pclsObj->Release();CoUninitialize();return result;
}void GetDisplayInfo()
{DISPLAY_DEVICE lpDisplayDevice;lpDisplayDevice.cb = sizeof(lpDisplayDevice);DWORD iDevNum = 0;CString DeviceID;while (EnumDisplayDevices(0, iDevNum, &lpDisplayDevice, 0)){DISPLAY_DEVICE lpDisplayDevice2;ZeroMemory(&lpDisplayDevice2, sizeof(lpDisplayDevice2));lpDisplayDevice2.cb = sizeof(lpDisplayDevice2);DWORD devMon = 0;while (EnumDisplayDevices(lpDisplayDevice.DeviceName, devMon, &lpDisplayDevice2, 0)){if (lpDisplayDevice2.StateFlags & DISPLAY_DEVICE_ACTIVE && !(lpDisplayDevice2.StateFlags & DISPLAY_DEVICE_MIRRORING_DRIVER)){DeviceID.Format(L"%s", lpDisplayDevice2.DeviceID);wcout << DeviceID.GetString() << endl;DeviceID = DeviceID.Mid(8, DeviceID.Find(L"\\", 9) - 8);_D3DKMDT_VIDEO_OUTPUT_TECHNOLOGY VideoOutputTechnology = GetConnectorInfo(DeviceID.GetString());switch (VideoOutputTechnology){case D3DKMDT_VOT_HDMI:wcout << " VideoOutputTechnology : HDMI" << endl;break;case D3DKMDT_VOT_INTERNAL:wcout << " VideoOutputTechnology : Internal Monitor" << endl;break;default:wcout << " VideoOutputTechnology : " << VideoOutputTechnology << endl;break;}}devMon++;ZeroMemory(&lpDisplayDevice2, sizeof(lpDisplayDevice2));lpDisplayDevice2.cb = sizeof(lpDisplayDevice2);}ZeroMemory(&lpDisplayDevice, sizeof(lpDisplayDevice));lpDisplayDevice.cb = sizeof(lpDisplayDevice);iDevNum++;}
}int main(int argc, char* argv[])
{GetDisplayInfo();cout << "press enter to exit" << endl;cin.get();return 0;
}// 运行程序: Ctrl + F5 或调试 >“开始执行(不调试)”菜单
// 调试程序: F5 或调试 >“开始调试”菜单// 入门使用技巧:
//   1. 使用解决方案资源管理器窗口添加/管理文件
//   2. 使用团队资源管理器窗口连接到源代码管理
//   3. 使用输出窗口查看生成输出和其他消息
//   4. 使用错误列表窗口查看错误
//   5. 转到“项目”>“添加新项”以创建新的代码文件，或转到“项目”>“添加现有项”以将现有代码文件添加到项目
//   6. 将来，若要再次打开此项目，请转到“文件”>“打开”>“项目”并选择 .sln 文件

如果需要检测到报警：

    if (iDevNum == 0){MessageBeep(-1);Sleep(1000);MessageBeep(-1);Sleep(1000);MessageBeep(-1);}

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