GPU とつながってるモニタ調べるヤツ

GraphicsCardAndMonitors.cpp

#include <iostream>
#include <dxgi1_2.h>
#include <wrl/client.h>

#pragma comment(lib, "dxgi.lib")

using namespace Microsoft::WRL;

void OutputGraphicsInformation()
{
	ComPtr<IDXGIFactory1> factory;
	if (FAILED(CreateDXGIFactory1(IID_PPV_ARGS(&factory)))) return;

	ComPtr<IDXGIAdapter1> adapter;
	for (int i = 0; factory->EnumAdapters1(i, &adapter) != DXGI_ERROR_NOT_FOUND; ++i)
	{
		DXGI_ADAPTER_DESC desc;
		if (FAILED(adapter->GetDesc(&desc))) continue;
		std::wcout << "GRAPHICS CARD[" << i << "] : " << desc.Description << std::endl;

		ComPtr<IDXGIOutput> output;
		for (int j = 0; adapter->EnumOutputs(j, &output) != DXGI_ERROR_NOT_FOUND; ++j)
		{
			DXGI_OUTPUT_DESC desc;
			if (FAILED(output->GetDesc(&desc))) continue;
			std::wcout << "  > MONITOR[" << j << "] = " << desc.DeviceName << std::endl;
		}
	}
}

int main()
{
	OutputGraphicsInformation();
	Sleep(5000);
	return 0;
}

output.txt

GRAPHICS CARD[0] : NVIDIA GeForce GTX 1080
  > MONITOR[0] = \\.\DISPLAY1
  > MONITOR[1] = \\.\DISPLAY2
GRAPHICS CARD[1] : Microsoft Basic Render Driver