How to diable keyboard

Raman Singh 0 Reputation points
2024-06-08T14:59:37.5266667+00:00

I want to disable keyboard using toggle switch and these are my code I don't know what the command is to disable keyboard using toggle Switch.
please help me I am beginner in Win UI (C++/CX & C++/WinRT).

<! --xaml -->
<ToggleSwitch IsOn="True">ToogleSwitch</ToggleSwitch>

//xaml.cpp
bool switchIsOn;
void MainWindow::ToogleSwitch(bool IsOn)
{
    switchIsOn = IsOn;
    if (switchIsOn == true)
    {
        
    }
}

//xaml.h
void ToogleSwitch(bool IsOn);
C++
C++
A high-level, general-purpose programming language, created as an extension of the C programming language, that has object-oriented, generic, and functional features in addition to facilities for low-level memory manipulation.
3,608 questions
XAML
XAML
A language based on Extensible Markup Language (XML) that enables developers to specify a hierarchy of objects with a set of properties and logic.
780 questions
Windows 11
Windows 11
A Microsoft operating system designed for productivity, creativity, and ease of use.
8,744 questions
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1 answer

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  1. Minxin Yu 10,781 Reputation points Microsoft Vendor
    2024-06-10T03:14:46.3733333+00:00

    Hi, @Raman Singh

    You could use hook.

          <ToggleSwitch x:Name="MyToggleSwitch" Header="Toggle Switch Example"  Toggled="ToggleSwitch_Toggled"/>
      <TextBox x:Name="MyTextBox" Header="Enter text here:" PlaceholderText="Type something" Width="300"  />

    header file

    #pragma once

#include <windows.h>
#include "MainWindow.g.h"
#pragma comment( lib, "user32.lib" )

static HHOOK g_keyboardHook =nullptr;
LRESULT CALLBACK KeyboardHookProc(int nCode, WPARAM wParam, LPARAM lParam);
namespace winrt::App1::implementation
{
  
    struct MainWindow : MainWindowT<MainWindow>
    {
     
     
        MainWindow()
        {
           
         
           
        };
        ~MainWindow()
        {
           
            if (g_keyboardHook != nullptr)
            {
                UnhookWindowsHookEx(g_keyboardHook);
                g_keyboardHook = nullptr;
            }
        };
        int32_t MyProperty();
        void MyProperty(int32_t value);
        void myButton_Click(IInspectable const& sender, Microsoft::UI::Xaml::RoutedEventArgs const& args);
        void ToggleSwitch_Toggled(IInspectable const& sender, Microsoft::UI::Xaml::RoutedEventArgs const& args)
        {
            if (MyToggleSwitch().IsOn())
            {
                g_keyboardHook = SetWindowsHookEx(WH_KEYBOARD_LL, KeyboardHookProc, nullptr, 0);
            }
            else
            {
                if (g_keyboardHook != nullptr)
                {
                    UnhookWindowsHookEx(g_keyboardHook);
                    g_keyboardHook = nullptr;
                }
            }
        }
    
    };
}
namespace winrt::App1::factory_implementation
{
    struct MainWindow : MainWindowT<MainWindow, implementation::MainWindow>
    {
    };
}

    cpp:

    ......
LRESULT CALLBACK KeyboardHookProc(int nCode, WPARAM wParam, LPARAM lParam)
{
    if (nCode >= 0)
    {
        if (wParam == WM_KEYDOWN || wParam == WM_SYSKEYDOWN)
        {
            return 1;
        }
    }
    return CallNextHookEx(g_keyboardHook, nCode, wParam, lParam);
}

    Best regards,

    Minxin Yu

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