在Windows 10周年纪念版中显示触摸键盘(TabTip.exe)

C:\Program Files\Common Files\microsoft shared\ink\TabTip.exe

// Find tray icon window
function FindTrayButtonWindow: THandle;
var
  SHellTrayWnd: THandle;
  TrayNotifyWnd: THandle;
begin
  Result := 0;
  SHellTrayWnd := FindWindow('SHell_TrayWnd',nil);
  if SHellTrayWnd > 0 then
  begin
    TrayNotifyWnd := FindWindowEx(SHellTrayWnd,'TrayNotifyWnd',nil);
    if TrayNotifyWnd > 0 then
    begin
      Result := FindWindowEx(TrayNotifyWnd,'TIPBand',nil);
    end;
  end;
end;

// Post mouse click messages to it
TrayButtonWindow := FindTrayButtonWindow;
if TrayButtonWindow > 0 then
begin
  Postmessage(TrayButtonWindow,WM_LBUTTONDOWN,MK_LBUTTON,$00010001);
  Postmessage(TrayButtonWindow,WM_LBUTTONUP,$00010001);
end;

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\TabletTip\1.7\EnableDesktopModeAutoInvoke=1

基本上它创建@L_607_5@未记录的接口ITipInvocation的实例，并调用其Toggle(HWND)方法，将桌面窗口作为参数传递。顾名思义，该方法根据其当前状态显示或隐藏键盘。

请注意，浏览器会在每个按钮点击创建@L_607_5@ITipInvocation实例。所以我相信实例不应该被缓存。我也注意到，资源管理器从未在获取的实例上调用Release()。我不太熟悉COM，但这看起来像@L_607_5@bug。

我在Windows 8.1，Windows 10和Windows 10周年纪念版，它的工作完美。这是C中的@L_607_5@最小例子，显然没有一些错误检查。

#include <initguid.h>
#include <Objbase.h>
#pragma hdrstop

// 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;
};

int WinMain(HINSTANCE hInst,HINSTANCE hPrevInstance,LPSTR lpCmdLine,int nCmdShow)
{
    HRESULT hr;
    hr = CoInitialize(0);

    ITipInvocation* tip;
    hr = CoCreateInstance(CLSID_UIHostNoLaunch,CLSCTX_INPROC_HANDLER | CLSCTX_LOCAL_SERVER,IID_ITipInvocation,(void**)&tip);
    tip->Toggle(GetDesktopWindow());
    tip->Release();
    return 0;
}

这是C#版本：

class Program
{
    static void Main(String[] args)
    {
        var uiHostNoLaunch = new UIHostNoLaunch();
        var tipInvocation = (ITipInvocation)uiHostNoLaunch;
        tipInvocation.Toggle(GetDesktopWindow());
        Marshal.ReleaseComObject(uiHostNoLaunch);
    }

    [ComImport,Guid("4ce576fa-83dc-4F88-951c-9d0782b4e376")]
    class UIHostNoLaunch
    {
    }

    [ComImport,Guid("37c994e7-432b-4834-a2f7-dce1f13b834b")]
    [InterfaCEType(ComInterfaCEType.InterfaceIsIUnkNown)]
    interface ITipInvocation
    {
        void Toggle(IntPtr hwnd);
    }

    [DllImport("user32.dll",SetLastError = falsE)]
    static extern IntPtr GetDesktopWindow();
}

更新：每个@EugeneK注释，我相信tabtip.exe是COM组件的COM服务器，所以如果您的代码获得REGDB_E_CLASsnoTREG，它应该可能运行tabtip.exe并重试。