// 4ce576fa-83dc-4F88-951c-9d0782b4e376
DEFINE_GUID(CLSID_UIHostNoLaunch,
    0x4CE576FA, 0x83DC, 0x4f88, 0x95, 0x1C, 0x9D, 0x07, 0x82, 0xB4, 0xE3, 0x76);

// 37c994e7_432b_4834_a2f7_dce1f13b834b
DEFINE_GUID(IID_ITipInvocation,
    0x37c994e7, 0x432b, 0x4834, 0xa2, 0xf7, 0xdc, 0xe1, 0xf1, 0x3b, 0x83, 0x4b);

struct ITipInvocation : IUnknown
{
    virtual HRESULT STDMETHODCALLTYPE Toggle(HWND wnd) = 0;
};

namespace
{
constexpr auto kKeyboardWindowClass = L"IPTip_Main_Window";
constexpr auto kWindowParentClass = L"ApplicationFrameWindow";
constexpr auto kWindowClass = L"Windows.UI.Core.CoreWindow";
constexpr auto kWindowCaption = L"Microsoft Text Input Application";
constexpr auto kTabTipPath = L"C:\\Program Files\\Common Files\\Microsoft Shared\\ink\\TabTip.exe";
constexpr auto kTabletTipSubKey = "Software\\Microsoft\\TabletTip";
constexpr auto kTabletTipOption = "EnableDesktopModeAutoInvoke";
}

bool ScreenKeyBoard::OpenOskKeyboard()
{
    if (!PublicUtils::Process::FindProcess("osk.exe").empty())
    {
        return true;
    }
    PVOID OldValue = NULL;
    //64位系統(tǒng)中32位程序要訪問(wèn)本機(jī)system32文件夾,需取消重定向到Syswow64
    BOOL bRet = Wow64DisableWow64FsRedirection(&OldValue);
    ShellExecuteW(NULL, L"open", L"osk.exe", NULL, NULL, SW_SHOWNORMAL);
    if (bRet)
    {
        Wow64RevertWow64FsRedirection(OldValue);
        return true;
    }
    else
    {
        std::cerr << "Wow64DisableWow64FsRedirection fail err code:" << GetLastError() << std::endl;
        return false;
    }
}

bool ScreenKeyBoard::OpenTabTipByProcess(const std::wstring& tabTipPath)
{
    //將進(jìn)程TabTip.exe拉起，如果是進(jìn)程存在的情況下，再次調(diào)用會(huì)直接顯示鍵盤(pán)界面
    if (!ShellExecuteW(NULL, L"open", tabTipPath.c_str(), NULL, NULL, SW_SHOWNORMAL))
    {
        std::cerr << "ShellExecuteW tabTip err:" << GetLastError() << std::endl;
        return false;
    }
    std::cout << "ShellExecuteW tabTip success";
    return true;
}

bool ScreenKeyBoard::OpenTabTipByProcess(const std::wstring& tabTipPath)
{
    //將進(jìn)程TabTip.exe拉起，如果是進(jìn)程存在的情況下，再次調(diào)用會(huì)直接顯示鍵盤(pán)界面
    if (!ShellExecuteW(NULL, L"open", tabTipPath.c_str(), NULL, NULL, SW_SHOWNORMAL))
    {
        std::cerr << "ShellExecuteW tabTip err:" << GetLastError() << std::endl;
        return false;
    }
    std::cout << "ShellExecuteW tabTip success";
    return true;
}

bool ScreenKeyBoard::OpenScreenKeyboard()
{
    if (!IsTabTipAutoInvokeOnDesktopMode())
    {
        return OpenTabTip();
    }

 
    //觸摸鍵盤(pán)有一設(shè)置項(xiàng):不處于平板電腦模式且未連接鍵盤(pán)時(shí)顯示觸摸鍵盤(pán)，增加延遲避開(kāi)系統(tǒng)調(diào)用鍵盤(pán)
    std::thread([]() {
        PublicUtils::Sleep(std::chrono::milliseconds(500));
        OpenTabTip();
    }).detach();
    return true;
}

bool ScreenKeyBoard::OpenTabTip()
{
    auto version = PublicUtils::Environment::OsVersion();
    std::cout << "os version:" << version.ToString() << std::endl;
    if (IsNewTabTipKeyboardVisable() || IsOldTabTipKeyboardVisable())
    {
        std::cout << "keyboard is visible" << std::endl;
        return true;
    }
    //系統(tǒng)版本大于等于win10 10.0.14393.0，需要使用com組件的接口才能將鍵盤(pán)界面顯示出來(lái)
    if (10 == version.GetMajor() && version.GetPatch() >= 14393)
    {
        return OpenTabTipByCom(kTabTipPath);
    }
    else
    {
        return OpenTabTipByProcess(kTabTipPath);
    }
}

![image.png](https://p1-juejin.byteimg.com/tos-cn-i-k3u1fbpfcp/233c5a6ce0804795be5ed48a207fbeb2~tplv-k3u1fbpfcp-watermark.image)
bool ScreenKeyBoard::IsNewTabTipKeyboardVisable()
{
    //win10下父窗口是ApplicationFrameWindow子窗口是Windows.UI.Core.CoreWindow
    HWND parent = FindWindowExW(NULL, NULL, kWindowParentClass, NULL);
    if (!parent)
    {
        std::cerr << "no more windows, keyboard state is unknown. class:" << PublicUtils::CharsetUtils::UnicodeToUTF8(kWindowParentClass) << std::endl;
        return false;
    }

    HWND wnd = FindWindowExW(parent, NULL, kWindowClass, kWindowCaption);
    if (!wnd)
    {
        std::cerr << "it's a child of a WindowParentClass1709 window - the keyboard is open. class:" << PublicUtils::CharsetUtils::UnicodeToUTF8(kWindowClass)
            << " caption" << PublicUtils::CharsetUtils::UnicodeToUTF8(kWindowCaption) << std::endl;
        return false;
    }

    //觸摸鍵盤(pán)顯示和隱藏不能用IsWindowVisible判斷,判斷方式可參考 https://stackoverflow.com/questions/32149880/how-to-identify-windows-10-background-store-processes-that-have-non-displayed-wi
    int cloaked = 0;
    if (DwmGetWindowAttribute(wnd, DWMWA_CLOAKED, &cloaked, DWM_CLOAKED_INHERITED) != S_OK)
    {
        std::cerr << "DwmGetWindowAttribute err:" << GetLastError() << std::endl;
        return false;
    }
    std::cout << "DwmGetWindowAttribute cloaked=" << cloaked;
    return 0 == cloaked;
}

bool ScreenKeyBoard::IsOldTabTipKeyboardVisable()
{
    HWND touchhWnd = FindWindowW(kKeyboardWindowClass, NULL);
    if (!touchhWnd)
    {
        std::cerr << "without window:" << PublicUtils::CharsetUtils::UnicodeToUTF8(kKeyboardWindowClass) << std::endl;
        return false;
    }

    unsigned long style = GetWindowLong(touchhWnd, GWL_STYLE);
    // 由于有的系統(tǒng)在鍵盤(pán)不顯示時(shí)候只是多返回一個(gè)WS_DISABLED這個(gè)字段。所以加一個(gè)它的判斷
    std::cout << "WS_CLIPSIBLINGS:" << (style & WS_CLIPSIBLINGS)
        << " WS_VISIBLE:" << (style & WS_VISIBLE)
        << " WS_POPUP:" << (style & WS_POPUP)
        << " WS_DISABLED:" << !(style & WS_DISABLED) << std::endl;
    return (style & WS_CLIPSIBLINGS) && (style & WS_VISIBLE) && (style & WS_POPUP) && !(style & WS_DISABLED);
}