UWP : Need to disable on-screen-keyboard on textbox click

Question

UWP : Need to disable on-screen-keyboard on textbox click

Because I need to Invoke third Party on-screen-keyboard.

Tried Below Code....But I was not able to disable on-screen-keyboard.

PreventKeyboardDisplayOnProgrammaticFocus="True" 

Both are getting Invoked Microsoft on-screen-keyboard and Third Party Keyboard.

Its not Working, But I tried "ishittestvisible=false" Its Working, But All Mouse Events are Blocked.

Any of the Solution is Fine..1. either disable on-screen-keyboard or 2.after making ishittestvisible=false Mouse Events Should Work.

Answer 1

The code below works for me in a WinUI 3 (Windows App SDK) application. It should work for UWP as well. It completely prevents the keyboard from showing, without blinking/flickering.

public sealed partial class CustomTextBox
{

    private void CustomTextBox_OnGotFocus(object sender, RoutedEventArgs e)
    {
        CoreInputView.GetForCurrentView().PrimaryViewShowing += BlockOnScreenKeyboard;
    }

    private void CustomTextBox_OnLostFocus(object sender, RoutedEventArgs e)
    {
        CoreInputView.GetForCurrentView().PrimaryViewShowing -= BlockOnScreenKeyboard;
    }

    private static void BlockOnScreenKeyboard(CoreInputView sender, CoreInputViewShowingEventArgs args)
    {
        args.TryCancel(); 
        sender.TryHide();
    }

    ...
}

args.TryCancel() does the job alone but when the app loses focus, the keyboard appears, so sender.TryHide() is needed to eliminate this bad-looking behavior.