我能够检测到连接到我的系统的所有监视器。我可以使用以下Windows API调用获取有关它们的很多相关信息:
我正在开发的系统是AIO(多合一),带有2个监视器。它具有我可以连接的外部HDMI输出和外部监视器。然后,通过端口复制器,我可以连接第四台显示器。所有监视器都在扩展我的桌面,并且它们都工作正常。
我的任务是检测通过HDMI端口连接的监视器。我能够使用上述API提取的监视器信息没有提供任何特定的信息,我可以通过这些信息来检测端口类型(例如HDMI或USB)。
有人知道使用什么API吗?谢谢!
您可以使用EnumDisplayDevices
方法获取监视器的EnumDisplayDevices
,然后获取DeviceID
WMI类(从Windows Vista开始可用)和WmiMonitorConnectionParams
属性,该属性返回WmiMonitorConnectionParams
枚举。
尝试下一个示例代码
VideoOutputTechnology
这将返回类似的内容>
D3DKMDT_VIDEO_OUTPUT_TECHNOLOGY
[许多显示器都支持DDC / CI 2B,使用D3DKMDT_VIDEO_OUTPUT_TECHNOLOGY
来询问显示器本身是否支持VCP功能#include "stdafx.h"
#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 = 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 authentication
NULL, // Authentication services
NULL, // Reserved
RPC_C_AUTHN_LEVEL_DEFAULT, // Default authentication
RPC_C_IMP_LEVEL_IMPERSONATE, // Default Impersonation
NULL, // Authentication info
EOAC_NONE, // Additional capabilities
NULL // 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 namespace
NULL, // User name. NULL = current user
NULL, // User password. NULL = current
0, // Locale. NULL indicates current
NULL, // 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 set
RPC_C_AUTHN_WINNT, // RPC_C_AUTHN_xxx
RPC_C_AUTHZ_NONE, // RPC_C_AUTHZ_xxx
NULL, // Server principal name
RPC_C_AUTHN_LEVEL_CALL, // RPC_C_AUTHN_LEVEL_xxx
RPC_C_IMP_LEVEL_IMPERSONATE, // RPC_C_IMP_LEVEL_xxx
NULL, // client identity
EOAC_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(L"WQL", 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);// String
if (!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);// Uint32
if (!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;
}
,这很容易。