Sample Code - WinApi: How to Get MacAddress

[C++] WinApi: How to Get MacAddress
#pragma comment(lib, "Iphlpapi.lib")
#include "iphlpapi.h"

BOOL GetMacAddress(char *pMacAddr)
{
	DWORD dwStatus;
	IP_ADAPTER_INFO *pAdapterInfo = NULL;
	IP_ADAPTER_INFO *pOriginalPtr = NULL;
	ULONG ulSizeAdapterInfo = 0;

	dwStatus = GetAdaptersInfo(pAdapterInfo, &ulSizeAdapterInfo);

	if (dwStatus == ERROR_BUFFER_OVERFLOW)
	{
		if (!(pAdapterInfo = (PIP_ADAPTER_INFO)malloc(ulSizeAdapterInfo)))
		{
			MessageBox(NULL, "Insufficient Memory", "GetMacAddress Error", MB_OK);
			return FALSE;
		}

		dwStatus = GetAdaptersInfo(pAdapterInfo, &ulSizeAdapterInfo);
	}


	char MacAddr[18];

	pOriginalPtr = pAdapterInfo;

	if (pAdapterInfo == NULL)
	{
		MessageBox(NULL, "No Interfaces Present \n", "Error", MB_OK);
		return FALSE;
	}

	while (pAdapterInfo != NULL)
	{

		if (pAdapterInfo->AddressLength == 6)
		{
			wsprintf(MacAddr, "%0.2X%0.2X%0.2X%0.2X%0.2X%0.2X\n", \
				(DWORD)pAdapterInfo->Address[0], \
				(DWORD)pAdapterInfo->Address[1], \
				(DWORD)pAdapterInfo->Address[2], \
				(DWORD)pAdapterInfo->Address[3], \
				(DWORD)pAdapterInfo->Address[4], \
				(DWORD)pAdapterInfo->Address[5]);
		}

		pAdapterInfo = pAdapterInfo->Next;
	}

	free(pAdapterInfo);

	strcpy(pMacAddr, MacAddr);

	return TRUE;
};