HWID

#include <windows.h>

UCHAR
szFileSys[255],
szVolNameBuff[255];

DWORD
dwMFL,
dwSysFlags,
dwSerial;

#define My_HWID (1289182852)

VOID CheckValidHardwareID()
{
	GetVolumeInformation("C:\\",(LPTSTR)szVolNameBuff,255,&dwSerial, &dwMFL,&dwSysFlags,(LPTSTR)szFileSys,255);
	if (dwSerial == My_HWID)
	{
		MessageBox(0,"VALID HARDWARE ID","INFORMATION",MB_OK | MB_ICONINFORMATION);
		// Serial valid
	}
	else
	{
		MessageBox(0,"VALID HARDWARE ID","INFORMATION",MB_OK | MB_ICONERROR);
		ExitProcess(1); // Force Exit
		// Invalid Serial
	}
}
BOOL WINAPI DllMain ( HMODULE hDll, DWORD dwReason, LPVOID lpReserved )
{
	if (dwReason == DLL_PROCESS_ATTACH)
	{
		CheckValidHardwareID();
	}
	return TRUE;
}