AUTOHDR_OFF.cpp

#include "stdafx.h"
#include "Windows.h"
#include <stdint.h>
#include <cstdlib>
#include <cstring>

int main()
{
uint32_t pathCount, modeCount;

uint8_t set[] = { 0x0A, 0x00, 0x00, 0x00, 0x18, 0x00, 0x00, 0x00, 0x14, 0x81, 0x00, 0x00,
				 0x00, 0x00, 0x00, 0x00, 0x04, 0x01, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00 };

uint8_t request[] = { 0x09, 0x00, 0x00, 0x00, 0x20, 0x00, 0x00, 0x00, 0x7C, 0x6F, 0x00,
					 0x00, 0x00, 0x00, 0x00, 0x00, 0x04, 0x01, 0x00, 0x00, 0xDB, 0x00,
					 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x40, 0x00, 0x00 };

if (ERROR_SUCCESS == GetDisplayConfigBufferSizes(QDC_ONLY_ACTIVE_PATHS, &pathCount, &modeCount))
{
	DISPLAYCONFIG_PATH_INFO* pathsArray = nullptr;
	DISPLAYCONFIG_MODE_INFO* modesArray = nullptr;

	const size_t sizePathsArray = pathCount * sizeof(DISPLAYCONFIG_PATH_INFO);
	const size_t sizeModesArray = modeCount * sizeof(DISPLAYCONFIG_MODE_INFO);

	pathsArray = static_cast<DISPLAYCONFIG_PATH_INFO*>(std::malloc(sizePathsArray));
	modesArray = static_cast<DISPLAYCONFIG_MODE_INFO*>(std::malloc(sizeModesArray));

	if (pathsArray != nullptr && modesArray != nullptr)
	{
		std::memset(pathsArray, 0, sizePathsArray);
		std::memset(modesArray, 0, sizeModesArray);

		if (ERROR_SUCCESS == QueryDisplayConfig(QDC_ONLY_ACTIVE_PATHS, &pathCount, pathsArray,
			&modeCount, modesArray, 0))
		{
			DISPLAYCONFIG_DEVICE_INFO_HEADER* setPacket =
				reinterpret_cast<DISPLAYCONFIG_DEVICE_INFO_HEADER*>(set);
			DISPLAYCONFIG_DEVICE_INFO_HEADER* requestPacket =
				reinterpret_cast<DISPLAYCONFIG_DEVICE_INFO_HEADER*>(request);

			for (int i = 0; i < modeCount; i++)
			{
				if (modesArray[i].infoType == DISPLAYCONFIG_MODE_INFO_TYPE_TARGET)
				{
					setPacket->adapterId.HighPart = modesArray[i].adapterId.HighPart;
					setPacket->adapterId.LowPart = modesArray[i].adapterId.LowPart;
					setPacket->id = modesArray[i].id;

					requestPacket->adapterId.HighPart = modesArray[i].adapterId.HighPart;
					requestPacket->adapterId.LowPart = modesArray[i].adapterId.LowPart;
					requestPacket->id = modesArray[i].id;
				}
			}

			if (ERROR_SUCCESS == DisplayConfigGetDeviceInfo(requestPacket))
			{
				set[20] = 0;
				DisplayConfigSetDeviceInfo(setPacket);
				}
			}
		}
		std::free(pathsArray);
		std::free(modesArray);
	}
return 0;
}