vc通过进程名返回进程id

std::string WcharToChar(const wchar_t* wp, size_t m_encode = CP_ACP)
{
std::string str;
int len = WideCharToMultiByte(m_encode, 0, wp, wcslen(wp), NULL, 0, NULL, NULL);
char *m_char = new char[len + 1];
WideCharToMultiByte(m_encode, 0, wp, wcslen(wp), m_char, len, NULL, NULL);
m_char[len] = '\0';
str = m_char;
delete m_char;
return str;
}

DWORD GetProcessIDFromName(char *strProcessName)
{
HANDLE snapshot;
PROCESSENTRY32 processinfo;
processinfo.dwSize = sizeof(processinfo);
snapshot = CreateToolhelp32Snapshot(TH32CS_SNAPPROCESS, 0);
if (snapshot == NULL)
{
return 0;
}

BOOL status = Process32First(snapshot, &processinfo);

while (status)
{
string str = WcharToChar(processinfo.szExeFile);
if (_stricmp(strProcessName, str.c_str()) == 0)
{
return processinfo.th32ProcessID;
}

status = Process32Next(snapshot, &processinfo);
}
return 0;
}