VC++.进程遍历2

#include <Psapi.h>
#include <vector>
BOOL TraversalProcess2(OUT std::vector<DWORD> &vec)
{
	vec.clear();
	try
	{
		BYTE *pbt = 0;
		DWORD dwSize = 0, dw = 0x1000;
		BOOL b = 0;
		for (; dw < INT_MAX && !b; dw *= 2)
		{
			if (pbt)
			{
				delete pbt;
				pbt = 0;
			}
			pbt = new BYTE[dw];
			if (pbt)
			{
				b = EnumProcesses((DWORD*)pbt, dw, &dwSize);
			}
		}
		if (pbt && b)
		{
			DWORD *pdw = (DWORD*)pbt;
			for (DWORD i = 0; i < dwSize / sizeof(DWORD); ++i)
			{
				vec.push_back(pdw[i]);
			}
			delete pbt;
			pbt = 0;
		}
	}
	catch (...)
	{
		OutputDebugStringA(__FUNCTION__);
		return 0;
	}
	return vec.size() > 0;
}

int main()
{
	std::vector<DWORD> vec;
	std::cout << TraversalProcess2(vec) << endl;
	for each (DWORD var in vec)
	{
		printf("%d\t", var);
		printf("\r\n");
	}

    return 0;
}