Question

我试图找出Windows 10虚拟触摸键盘是否可见，以确定是否从我的应用程序中打开它。以下代码已经工作正常，直到最新的Windows 10更新15063或可能在它之前。似乎微软可能会改变窗口样式，但我无法弄明白。

    public static bool IsKeyboardVisible()
    {
        IntPtr keyboardHandle = GetKeyboardWindowHandle();
        // Specifies we wish to retrieve window styles.
        int GWL_STYLE = -16;

        //The window is disabled. See http://msdn.microsoft.com/en-gb/library/windows/desktop/ms632600(v=vs.85).aspx.
        UInt32 WS_VISIBLE =               0x10000000;
        UInt32 WS_DISABLED =              0x08000000;
        UInt32 WS_POPUP =                 0x80000000;


        bool visible = false;
        bool disabled = false;

        if (keyboardHandle != IntPtr.Zero)
        {
            UInt32 style = GetWindowLong(keyboardHandle, GWL_STYLE);
            visible = ((style & WS_VISIBLE) == WS_VISIBLE);
            disabled = ((style & WS_DISABLED) == WS_DISABLED); // ref https://stackoverflow.com/questions/11065026/get-window-state-of-another-process
            log.InfoFormat("style:{0:X4} visible:{1} disabled:{2}", style, visible, disabled);
        }

        return visible && !disabled ;
    }

这与：Show touch keyboard (TabTip.exe) in Windows 10 Anniversary edition

有关

Answer 1

我用Spy++ 做了一些研究。看起来Fall Creators Update（版本1709）中的新键盘由另一个窗口托管。此窗口的标题为Windows.UI.Core.CoreWindow，Microsoft Text Input Application为其标题。

以下代码适用于所有Windows 10版本，包括新的1803及更早版本的Windows版本（我相信从Windows 8开始）。

static class TouchKeyboard
{
    public static bool GetIsOpen()
    {
        return GetIsOpen1709() ?? GetIsOpenLegacy();
    }

    private static bool? GetIsOpen1709()
    {
        var parent = IntPtr.Zero;
        for (;;)
        {
            parent = FindWindowEx(IntPtr.Zero, parent, WindowParentClass1709);
            if (parent == IntPtr.Zero)
                return null; // no more windows, keyboard state is unknown

            // if it's a child of a WindowParentClass1709 window - the keyboard is open
            var wnd = FindWindowEx(parent, IntPtr.Zero, WindowClass1709, WindowCaption1709);
            if (wnd != IntPtr.Zero)
                return true;
        }
    }

    private static bool GetIsOpenLegacy()
    {
        var wnd = FindWindowEx(IntPtr.Zero, IntPtr.Zero, WindowClass);
        if (wnd == IntPtr.Zero)
            return false;

        var style = GetWindowStyle(wnd);
        return style.HasFlag(WindowStyle.Visible)
            && !style.HasFlag(WindowStyle.Disabled);
    }

    private const string WindowClass = "IPTip_Main_Window";
    private const string WindowParentClass1709 = "ApplicationFrameWindow";
    private const string WindowClass1709 = "Windows.UI.Core.CoreWindow";
    private const string WindowCaption1709 = "Microsoft Text Input Application";

    private enum WindowStyle : uint
    {
        Disabled = 0x08000000,
        Visible = 0x10000000,
    }

    private static WindowStyle GetWindowStyle(IntPtr wnd)
    {
        return (WindowStyle)GetWindowLong(wnd, -16);
    }

    [DllImport("user32.dll", SetLastError = false)]
    private static extern IntPtr FindWindowEx(IntPtr parent, IntPtr after, string className, string title = null);

    [DllImport("user32.dll", SetLastError = false)]
    private static extern uint GetWindowLong(IntPtr wnd, int index);
}

更新：我更新了答案以及与Redstone 4（v1803）兼容的代码。

Answer 2

我正在使用此解决方案，并且它可以在Windows 1607、1709和1803上运行（请在代码中检查下面的Main方法）：

using System;
using System.Drawing;
using System.Runtime.InteropServices;

namespace ConsoleApp1
{
    class Program
    {

        [ComImport, Guid("D5120AA3-46BA-44C5-822D-CA8092C1FC72")]
        public class FrameworkInputPane
        {
        }

        [ComImport, System.Security.SuppressUnmanagedCodeSecurity,
        InterfaceType(ComInterfaceType.InterfaceIsIUnknown),
        Guid("5752238B-24F0-495A-82F1-2FD593056796")]
        public interface IFrameworkInputPane
        {
            [PreserveSig]
            int Advise(
                [MarshalAs(UnmanagedType.IUnknown)] object pWindow,
                [MarshalAs(UnmanagedType.IUnknown)] object pHandler,
                out int pdwCookie
                );

            [PreserveSig]
            int AdviseWithHWND(
                IntPtr hwnd,
                [MarshalAs(UnmanagedType.IUnknown)] object pHandler,
                out int pdwCookie
                );

            [PreserveSig]
            int Unadvise(
                int pdwCookie
                );

            [PreserveSig]
            int Location(
                out Rectangle prcInputPaneScreenLocation
                );
        }


        static void Main(string[] args)
        {
            var inputPane = (IFrameworkInputPane)new FrameworkInputPane();
            inputPane.Location(out var rect);
            Console.WriteLine((rect.Width == 0 && rect.Height == 0) ? "Keyboard not visible" : "Keyboard visible");
        }
    }
}

它使用 IFrameworkInputPane 接口（https://docs.microsoft.com/en-us/windows/desktop/api/shobjidl_core/nn-shobjidl_core-iframeworkinputpane）

确定Windows 10 Touch键盘是可见还是隐藏

2 个答案: