C / C++ / MFC

// global variables
_CrtMemState s1, s2, s3;


// last step of initialization

	_CrtMemCheckpoint(&s1);		
	::SetTimer(NULL, NULL, 1, OnPollTimer ); // First polling cycle is immediate

// Here's the callback code

VOID CALLBACK OnPollTimer( HWND hwnd, UINT uMsg, UINT idEvent, DWORD dwTime )
{

	AFX_MANAGE_STATE(AfxGetStaticModuleState( ));

	
	_Module.m_bProcessRunning = TRUE;
	// Kill the timer
	::KillTimer(hwnd, idEvent);

	DoPollTimer();
	TRACE0(_T("OnPollTimer 1\r\n"));
_CrtMemCheckpoint(&s2);
_CrtMemDifference(&s3, &s1, &s2);
_CrtMemDumpStatistics(&s3);	

TRACE0("----------------------------------------------------------\r\n");
	
	::SetTimer(NULL, NULL, g_lPollFreqSecs * SECOND, OnPollTimer );
	_Module.m_bProcessRunning = FALSE;

}