#include <stdio.h>
#include <windows.h>
#include <tchar.h>
#include <winperf.h>
#include <pdh.h>

#define	CHECK_STAT(func, end) \
do { \
	PDH_STATUS __zz_stat; \
	__zz_stat = (func); \
	if(__zz_stat != ERROR_SUCCESS) { \
		_ftprintf(stderr, "error! ret=0x%x in line %d\n", __zz_stat, __LINE__); \
		goto end; \
	} \
} while(0)

int main(int argc, char *argv[])
{
	HQUERY hQuery;
	HCOUNTER hCounter;
	PDH_FMT_COUNTERVALUE fmtVal;

	if(argc != 2) {
		_ftprintf(stderr, "Usage: %s counter_name\n", argv[0]);
		return 1;
	}

	if(PdhOpenQuery(NULL, 0, &hQuery) != ERROR_SUCCESS) {
		_ftprintf(stderr, "Something is wrong...\n");
		return 2;
	}
	CHECK_STAT(PdhAddCounter(hQuery, argv[1], 0, &hCounter), end);
	CHECK_STAT(PdhCollectQueryData(hQuery), end);
	CHECK_STAT(PdhGetFormattedCounterValue(hCounter, PDH_FMT_DOUBLE, NULL, &fmtVal), end);
	_tprintf("%s = %f\n", argv[1], fmtVal.doubleValue);

end:
	PdhCloseQuery(hQuery);
	return 0;
}