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PODisable keyboard using c#
 

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  1. PODisable keyboard using c#
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    <p>I'm writing a program which is a webbrowser and disable all the keyboard shortcuts and keys. It is working but not perfectly. i found a thread where i got the code:</p> <p><a href="https://stackoverflow.com/questions/1175675/blocking-shortcut-keys-using-c-sharp">Blocking shortcut keys using c#</a></p> <p>And my problem is: everytime i open the program, first i have to click in the window or use a shortcut and click in the window again. and after that, it works. but it have to work when i open it so i don't have to click two times...</p> <p>somebody got an idea?</p> <p>cheers</p> <p>EDIT: Okay. I try to explain my problem in another way:</p> <p>First I open the program. And then I should not be able to press any keys like Win+Tab etc. But I am still able to press keys. Then if I click in the window of my program, press a key and click in the window again, it works. But i want that the program works when I open it so I don't have to click in the window first. I got some code here:</p> <pre><code>using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Linq; using System.Text; using System.Windows.Forms; using System.Runtime.InteropServices; using System.Diagnostics; namespace Browser { public partial class Form1 : Telerik.WinControls.UI.RadForm { public Form1() { InitializeComponent(); } private delegate int LowLevelKeyboardProcDelegate(int nCode, int wParam, ref KBDLLHOOKSTRUCT lParam); [DllImport("user32.dll", EntryPoint = "SetWindowsHookExA", CharSet = CharSet.Ansi)] private static extern int SetWindowsHookEx( int idHook, LowLevelKeyboardProcDelegate lpfn, int hMod, int dwThreadId); [DllImport("user32.dll")] private static extern int UnhookWindowsHookEx(int hHook); [DllImport("user32.dll", EntryPoint = "CallNextHookEx", CharSet = CharSet.Ansi)] private static extern int CallNextHookEx( int hHook, int nCode, int wParam, ref KBDLLHOOKSTRUCT lParam); const int WH_KEYBOARD_LL = 13; private int intLLKey; private KBDLLHOOKSTRUCT lParam; private struct KBDLLHOOKSTRUCT { public int vkCode; int scanCode; public int flags; int time; int dwExtraInfo; } private int LowLevelKeyboardProc( int nCode, int wParam, ref KBDLLHOOKSTRUCT lParam) { bool blnEat = false; switch (wParam) { case 256: case 257: case 260: case 261: //Alt+Tab, Alt+Esc, Ctrl+Esc, Windows Key if (((lParam.vkCode == 9) &amp;&amp; (lParam.flags == 32)) || ((lParam.vkCode == 27) &amp;&amp; (lParam.flags == 32)) || ((lParam.vkCode == 27) &amp;&amp; (lParam.flags == 0)) || ((lParam.vkCode == 91) &amp;&amp; (lParam.flags == 1)) || ((lParam.vkCode == 92) &amp;&amp; (lParam.flags == 1)) || ((true) &amp;&amp; (lParam.flags == 32))) { blnEat = true; } break; } if (blnEat) return 1; else return CallNextHookEx(0, nCode, wParam, ref lParam); } private void KeyboardHook(object sender, EventArgs e) { intLLKey = SetWindowsHookEx(WH_KEYBOARD_LL, new LowLevelKeyboardProcDelegate(LowLevelKeyboardProc), System.Runtime.InteropServices.Marshal.GetHINSTANCE( System.Reflection.Assembly.GetExecutingAssembly().GetModules()[0]).ToInt32(), 0); } private void ReleaseKeyboardHook() { intLLKey = UnhookWindowsHookEx(intLLKey); } private void Form1_Load(object sender, EventArgs e) { this.WindowState = FormWindowState.Maximized; } private void webBrowser1_PreviewKeyDown(object sender, PreviewKeyDownEventArgs e) { KeyboardHook(this, e); } } } </code></pre> <p>I hope you know what I mean now Cheers</p>
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    1. COSo expecting to get hammered on accessibility at any point? Why?
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    2. COMaybe I should set focus on webbrowser1. But .Focus() doesnt work :/
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    3. COthis might help, maybe http://stackoverflow.com/questions/5312755/focusing-webbrowser-control-in-a-c-sharp-application
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