通过进程名获取 窗口句柄

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HWND FindMainWindow(unsigned int processID)
{
    struct HANDLE_DATA {
        unsigned int processID;
        HWND handle;
    } data;
    data.processID = processID;
    data.handle = 0;

    static auto IsMainWindow=[](HWND handle)->BOOL
    {
        return GetWindow(handle, GW_OWNER) == (HWND)0 && IsWindowVisible(handle);
    };

    static auto EnumWindowsCallback=[](HWND handle, LPARAM lParam)
    {
        HANDLE_DATA& data = *(HANDLE_DATA*)lParam;
        unsigned long process_id = 0;
        GetWindowThreadProcessId(handle, &process_id);
        if (data.processID != process_id || !IsMainWindow(handle)) {
            return TRUE;
        }
        data.handle = handle;
        return FALSE;
    };

    EnumWindows(EnumWindowsCallback, (LPARAM)&data);

    return data.handle;
}

DWORD GetProcessID(const char *ProcessName)
{
    PROCESSENTRY32 pe32;
    pe32.dwSize = sizeof(PROCESSENTRY32);

    //获取进程快照
    HANDLE hProcessSnap = ::CreateToolhelp32Snapshot(TH32CS_SNAPPROCESS, 0);
    if (hProcessSnap == INVALID_HANDLE_VALUE)
    {
        //   qDebug("CreateToolhelp32Snapshot 调用失败.");
        return -1;
    }

    //遍历进程快照，轮流显示每个进程的信息
    BOOL bMore = ::Process32First(hProcessSnap, &pe32);
    while (bMore)
    {
        // qDebug("进程名称：%ls", pe32.szExeFile); //这里得到的应该是宽字符，用%ls,不然无法正常打印
        // qDebug("进程ID：%u", pe32.th32ProcessID);
        if ( QString( pe32.szExeFile ) == ( ProcessName ) )
        {
            qDebug("进程名称：%ls", pe32.szExeFile);
            qDebug("进程ID：%u", pe32.th32ProcessID);
            qDebug("pcPriClassBase ：%u", pe32.pcPriClassBase);
            qDebug("th32ParentProcessID ：%u", pe32.th32ParentProcessID);
            qDebug("cntThreads ：%u", pe32.cntThreads);
            break;
        }

        bMore = ::Process32Next(hProcessSnap, &pe32);
    }

    //不要忘记清除掉snapshot对象
    ::CloseHandle(hProcessSnap);

    return pe32.th32ProcessID;
}