Question

Windows 8中是否有办法检测虚拟键盘是否在屏幕上可见？我使用tabtip.exe

Answer 1

在谷歌上进行短暂搜索后，我可以做一些可能对你有帮助的事情。下面的代码公开了Windows API的一个功能，并使用它来了解给定进程的当前状态。将状态理解为最小化，最大化，隐藏或正常。

如果程序正在运行且未最小化或隐藏，则ProccesIsRunningNotMinimized方法返回true。

我不知道这对你有帮助，但这是一个开始。

public bool ProccesIsRunningNotMinimized(string exeName)
{
    Process[] processes = Process.GetProcesses();
    foreach (Process p in processes)
    {
        if (p.ProcessName.ToLower() == exeName.ToLower())
        {
            var placement = GetPlacement(p.MainWindowHandle);
            if (placement.showCmd.ToString().ToLower() != "minimized" && placement.showCmd.ToString().ToLower() != "hide") 
            return true;
        }

    }
    return false;


}

// Get the placement of the target process
private static WINDOWPLACEMENT GetPlacement(IntPtr hwnd)
{
    WINDOWPLACEMENT placement = new WINDOWPLACEMENT();
    placement.length = Marshal.SizeOf(placement);
    GetWindowPlacement(hwnd, ref placement);
    return placement;
}

//Exposes the function of Windows API
[DllImport("user32.dll", SetLastError = true)]
[return: MarshalAs(UnmanagedType.Bool)]
internal static extern bool GetWindowPlacement(
    IntPtr hWnd, ref WINDOWPLACEMENT lpwndpl);


//Create a struct to receive the data
[Serializable]
[StructLayout(LayoutKind.Sequential)]
internal struct WINDOWPLACEMENT
{
    public int length;
    public int flags;
    public ShowWindowCommands showCmd;
    public System.Drawing.Point ptMinPosition;
    public System.Drawing.Point ptMaxPosition;
    public System.Drawing.Rectangle rcNormalPosition;
}

internal enum ShowWindowCommands : int
{
    Hide = 0,
    Normal = 1,
    Minimized = 2,
    Maximized = 3,
}

要检查VK是否在屏幕上运行且可见，请执行以下操作：

if (this.ProccesIsRunningNotMinimized("tabtip"))
{
    // do something
}

Answer 2

此代码在Windows 7上运行正常。在Windows 8上无效。

如何检测软件键盘是否可见

2 个答案: