Using Window Handle to disable Mouse clicks and Keyboard Inputs using c#

Posted by srk on Stack Overflow See other posts from Stack Overflow or by srk
Published on 2010-05-21T01:14:15Z Indexed on 2010/05/21 1:20 UTC
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I need to disable the Mouse Clicks, Mouse movement and Keyboard Inputs for a specific windows for a Kiosk application. Is it Feasible in C# ?

I have removed the menu bar and title bar of a specific window, will that be a starting point to achieve the above requirement ?

The code for removing the menu bar and title bar using window handle :

 #region Constants
    //Finds a window by class name
    [DllImport("USER32.DLL")]
    public static extern IntPtr FindWindow(string lpClassName, string lpWindowName);

    //Sets a window to be a child window of another window
    [DllImport("USER32.DLL")]
    public static extern IntPtr SetParent(IntPtr hWndChild, IntPtr hWndNewParent);

    //Sets window attributes
    [DllImport("USER32.DLL")]
    public static extern int SetWindowLong(IntPtr hWnd, int nIndex, int dwNewLong);

    //Gets window attributes
    [DllImport("USER32.DLL")]
    public static extern int GetWindowLong(IntPtr hWnd, int nIndex);

    [DllImport("user32.dll", EntryPoint = "FindWindow", SetLastError = true)]
    static extern IntPtr FindWindowByCaption(IntPtr ZeroOnly, string lpWindowName);

    [DllImport("user32.dll")]
    static extern IntPtr GetMenu(IntPtr hWnd);

    [DllImport("user32.dll")]
    static extern int GetMenuItemCount(IntPtr hMenu);

    [DllImport("user32.dll")]
    static extern bool DrawMenuBar(IntPtr hWnd);

    [DllImport("user32.dll")]
    static extern bool RemoveMenu(IntPtr hMenu, uint uPosition, uint uFlags);

    //assorted constants needed
    public static uint MF_BYPOSITION = 0x400;
    public static uint MF_REMOVE = 0x1000;
    public static int GWL_STYLE = -16;
    public static int WS_CHILD = 0x40000000; //child window
    public static int WS_BORDER = 0x00800000; //window with border
    public static int WS_DLGFRAME = 0x00400000; //window with double border but no title
    public static int WS_CAPTION = WS_BORDER | WS_DLGFRAME; //window with a title bar 
    public static int WS_SYSMENU = 0x00080000; //window menu  
    #endregion

    public static void WindowsReStyle()
    { 
        Process[] Procs = Process.GetProcesses();
        foreach (Process proc in Procs)
        {
            if (proc.ProcessName.StartsWith("notepad"))
            {
                IntPtr pFoundWindow = proc.MainWindowHandle;
                int style = GetWindowLong(pFoundWindow, GWL_STYLE);

                //get menu
                IntPtr HMENU = GetMenu(proc.MainWindowHandle);
                //get item count
                int count = GetMenuItemCount(HMENU);
                //loop & remove
                for (int i = 0; i < count; i++)
                    RemoveMenu(HMENU, 0, (MF_BYPOSITION | MF_REMOVE));

                //force a redraw
                DrawMenuBar(proc.MainWindowHandle);
                SetWindowLong(pFoundWindow, GWL_STYLE, (style & ~WS_SYSMENU)); 
                SetWindowLong(pFoundWindow, GWL_STYLE, (style & ~WS_CAPTION)); 
            } 
        }
    }

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