Access to display the data

#define _CRT_NON_CONFORMING_SWPRINTFS
#define _CRT_SECURE_NO_WARNINGS

#include <windows.h>
#include <tchar.h>
#include <initguid.h>
#include <wmistr.h>

DEFINE_GUID(wmi_monitor_id_guid, 0x671a8285, 0x4edb, 0x4cae, 0x99, 0xfe, 0x69, 0xa1, 0x5c, 0x48, 0xc0, 0xbc);

typedef struct _wmi_monitor_id
{
    
	unsigned short product_code_id[16];
	unsigned short serial_number_id[16];
	unsigned short manufacturer_name[16];
	unsigned char week_of_manufacture;
	unsigned short year_of_manufacture;
	unsigned short user_friendly_name_length;
	unsigned short user_friendly_name[1];
} wmi_monitor_id;

#define OFFSET_TO_PTR(base_address, offset_length) ((PBYTE)((PBYTE)base_address + offset_length))

typedef HRESULT(WINAPI* FWmiOpenBlock) (IN LPGUID , IN DWORD , OUT PLONG);
typedef HRESULT(WINAPI* FWmiQueryAllDataW) (IN LONG , PULONG , OUT PUCHAR);
typedef HRESULT(WINAPI* FWmiCloseBlock) (IN LONG);

int main(int argc, char* argv[])
{
    
	HMODULE advapi32 = LoadLibraryW(L"Advapi32.dll");
	if (!advapi32) return 0;

	wprintf(L"current process id = %d \r\n", GetCurrentProcessId());

	FWmiOpenBlock WmiOpenBlock = (FWmiOpenBlock)GetProcAddress(advapi32, "WmiOpenBlock");
	FWmiQueryAllDataW WmiQueryAllData = (FWmiQueryAllDataW)GetProcAddress(advapi32, "WmiQueryAllDataW");
	FWmiCloseBlock WmiCloseBlock = (FWmiCloseBlock)GetProcAddress(advapi32, "WmiCloseBlock");
	if (WmiOpenBlock && WmiQueryAllData && WmiCloseBlock)
	{
    
		LONG handle = 0;
		HRESULT hr = WmiOpenBlock((LPGUID)&wmi_monitor_id_guid, GENERIC_READ, &handle);
		if (hr == S_OK)
		{
    
			ULONG buffer_size = 1024 * 4;
			UCHAR* data_buffer = new UCHAR[buffer_size];
			if (data_buffer)
			{
    
				memset(data_buffer, 0, buffer_size);

				hr = WmiQueryAllData(handle, &buffer_size, data_buffer);
				if (hr == S_OK)
				{
    
					while (true)
					{
    
						wmi_monitor_id* monitor_id = nullptr;
						PWNODE_ALL_DATA all_data = (PWNODE_ALL_DATA)data_buffer;
						if (all_data->WnodeHeader.Flags & WNODE_FLAG_FIXED_INSTANCE_SIZE)
							monitor_id = (wmi_monitor_id*)&data_buffer[all_data->DataBlockOffset];
						else
							monitor_id = (wmi_monitor_id*)&data_buffer[all_data->OffsetInstanceDataAndLength[0].OffsetInstanceData];

						ULONG offset = (ULONG)data_buffer[all_data->OffsetInstanceNameOffsets];
						WCHAR* instance_name = (WCHAR*)OFFSET_TO_PTR(all_data, offset + sizeof(USHORT));
						wprintf(L"instance name = %s \r\n", instance_name);

						WCHAR* user_friendly_name = (WCHAR*)monitor_id->user_friendly_name;
						wprintf(L"user friendly name = %s \r\n", user_friendly_name);

						WCHAR* manufacturer_name = (WCHAR*)monitor_id->manufacturer_name;
						wprintf(L"manufacturer name = %s \r\n", manufacturer_name);

						WCHAR* product_code_id = (WCHAR*)monitor_id->product_code_id;
						wprintf(L"product code id = %s \r\n", product_code_id);

						WCHAR* serial_number_id = (WCHAR*)monitor_id->serial_number_id;
						wprintf(L"serial number id = %s \r\n", serial_number_id);

						if (!all_data->WnodeHeader.Linkage) break;
						data_buffer += all_data->WnodeHeader.Linkage;
					}
				}
			
				delete[] data_buffer;
			}

			WmiCloseBlock(handle);
		}
	}

	system("pause");
	return 0;
}