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] = '';
    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;
}

参考：https://www.cnblogs.com/pswzone/archive/2012/07/25/2609115.html