Hybrid App - The on-screen keyboard should be automatically invoked when the demo runs on tablet devices

Hi Michael,

I have tested this approach in Windows 10 and confirm that it does not work there. This is the reason why this functionality is not implemented on our side so far - there is no guarantee that an approach that works in one version will work on another.

Regarding the issue on Windows 8.1, the sample Andrey attached works properly on my side, and I have the same version as you - 6.3, build version is 9600. Honestly, it's difficult to say why this approach does not work on your side. Considering the fact that the original WpfTouchKeyboard works properly on your side, the issue may be related to a specific DevExpress version. Would you please check what build of our controls you are using at the moment? You can check it in the Debug->Windows->Modules window.
Just in case, how are you focusing editors to reproduce the issue? Are you using the touch screen or the mouse?
I have also noticed that the keyboard is sometimes not displayed immediately - I have to tap an editor two or three times to invoke it. Please check if you have a similar issue on your side.

As a possible alternative, try invoking the keyboard manually, for example, using Process.Start:

C#
Process.Start("osk.exe")  

A similar approach is described in the Adding Touch Keyboard Support to a WPF Desktop Application article.
To invoke a keyboard when our editor is focused, you can use a handler like this one:

C#
public MainWindow() {  
    InitializeComponent();  
    //...  
    PreviewGotKeyboardFocus += new KeyboardFocusChangedEventHandler(MainWindow_PreviewGotKeyboardFocus);  
}  
void MainWindow_PreviewGotKeyboardFocus(object sender, KeyboardFocusChangedEventArgs e) {  
    TextEdit editor = LayoutTreeHelper.GetVisualParents((DependencyObject)e.OriginalSource).Where(x => x is TextEdit).Cast<TextEdit>().FirstOrDefault();  
    if (editor != null)  
        _touchKeyboardProvider.ShowTouchKeyboard();  
}  

Ivan,
I will look into it thnx,
I did find some interesting info about issues I experienced.
Another technique for showing and hiding the touch keyboard in a desktop application is described in detail at http://brianlagunas.com/showing-windows-8-touch-keyboard-wpf/, but at the time this article was written there was a bug in .NET Framework 4.5.2 that causes applications that use this technique to stop responding to the user. Microsoft has released hotfix 3026376 (https://support.microsoft.com/en-us/kb/3026376) to address this issue, but the hotfix must be downloaded directly from Microsoft as it is not yet available in Windows Update.
at some point my application stopped responding… this is probably the moment everything was implemented correctly for the keyboard

It looks like you are right - the sample Andrey attached does not work on our machine with .NET Framework 4.5.2 installed (by the way, his sample uses the approach described in http://brianlagunas.com/showing-windows-8-touch-keyboard-wpf/). Moreover, installing .NET Framework 4.6 fixed the issue and the project started properly. Try installing that version on your side (you can download it here) and let me know if this helps.