Winform应用程序_如何屏蔽键盘输入 顶着有分
我现在做的WINFORM程序需要屏蔽掉键盘操作(点击键盘上的所有按键都没效果),请问该如何实现呢?
[解决办法]
重写窗体 protected override void WndProc(ref Message m)
过滤掉键盘消息
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http://topic.csdn.net/t/20041220/21/3661867.html
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感觉是不是应该重写键盘钩子啊
[解决办法]
http://topic.csdn.net/u/20091216/12/a9e83cfc-0c21-44d7-9ebe-1936746f34d9.html?46213
[解决办法]
首先创建一个类,继承Form。然后重写WndProc方法。
protected override void WndProc(ref Message m) { if (m.Msg != 0x0100) base.WndProc(ref m); }
[解决办法]
using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Text; using System.Windows.Forms; using System.Runtime.InteropServices; using System.Reflection; using System.Diagnostics; using Microsoft.Win32; namespace WindowsApplication1 { public partial class Form2 : Form { //委托 public delegate int HookProc(int nCode, int wParam, IntPtr lParam); static int hHook = 0; public const int WH_KEYBOARD_LL = 13; //LowLevel键盘截获,如果是WH_KEYBOARD=2,并不能对系统键盘截取,Acrobat Reader会在你截取之前获得键盘。 HookProc KeyBoardHookProcedure; //键盘Hook结构函数 [StructLayout(LayoutKind.Sequential)] public class KeyBoardHookStruct { public int vkCode; public int scanCode; public int flags; public int time; public int dwExtraInfo; } #region DllImport //设置钩子 [DllImport("user32.dll")] public static extern int SetWindowsHookEx(int idHook, HookProc lpfn, IntPtr hInstance, int threadId); [DllImport("user32.dll", CharSet = CharSet.Auto, CallingConvention = CallingConvention.StdCall)] //抽掉钩子 public static extern bool UnhookWindowsHookEx(int idHook); [DllImport("user32.dll")] //调用下一个钩子 public static extern int CallNextHookEx(int idHook, int nCode, int wParam, IntPtr lParam); [DllImport("kernel32.dll")] public static extern int GetCurrentThreadId(); [DllImport("kernel32.dll")] public static extern IntPtr GetModuleHandle(string name); public void Hook_Start() { // 安装键盘钩子 if (hHook == 0) { KeyBoardHookProcedure = new HookProc(KeyBoardHookProc); //hHook = SetWindowsHookEx(2, // KeyBoardHookProcedure, // GetModuleHandle(Process.GetCurrentProcess().MainModule.ModuleName), GetCurrentThreadId()); hHook = SetWindowsHookEx(WH_KEYBOARD_LL, KeyBoardHookProcedure, GetModuleHandle(Process.GetCurrentProcess().MainModule.ModuleName), 0); //如果设置钩子失败. if (hHook == 0) { Hook_Clear(); //throw new Exception("设置Hook失败!"); } } } //取消钩子事件 public void Hook_Clear() { bool retKeyboard = true; if (hHook != 0) { retKeyboard = UnhookWindowsHookEx(hHook); hHook = 0; } //如果去掉钩子失败. if (!retKeyboard) throw new Exception("UnhookWindowsHookEx failed."); } //这里可以添加自己想要的信息处理 public static int KeyBoardHookProc(int nCode, int wParam, IntPtr lParam) { if (nCode >= 0) { KeyBoardHookStruct kbh = (KeyBoardHookStruct)Marshal.PtrToStructure(lParam, typeof(KeyBoardHookStruct)); if (kbh.vkCode == 91) // 截获左win(开始菜单键) { return 1; } if (kbh.vkCode == 92)// 截获右win { return 1; } if (kbh.vkCode == (int)Keys.Escape && (int)Control.ModifierKeys == (int)Keys.Control) //截获Ctrl+Esc { return 1; } if (kbh.vkCode == (int)Keys.F4 && (int)Control.ModifierKeys == (int)Keys.Alt) //截获alt+f4 { return 1; } if (kbh.vkCode == (int)Keys.Tab && (int)Control.ModifierKeys == (int)Keys.Alt) //截获alt+tab { return 1; } if (kbh.vkCode == (int)Keys.Escape && (int)Control.ModifierKeys == (int)Keys.Control + (int)Keys.Shift) //截获Ctrl+Shift+Esc { return 1; } if (kbh.vkCode == (int)Keys.Space && (int)Control.ModifierKeys == (int)Keys.Alt) //截获alt+空格 { return 1; } if (kbh.vkCode == 241) //截获F1 { return 1; } if ((int)Control.ModifierKeys == (int)Keys.Control + (int)Keys.Alt + (int)Keys.Delete) //截获Ctrl+Alt+Delete { return 1; } //if ((int)Control.ModifierKeys == (int)Keys.Control + (int)Keys.Shift) //截获Ctrl+Shift //{ // return 1; //} //if (kbh.vkCode == (int)Keys.Space && (int)Control.ModifierKeys == (int)Keys.Control + (int)Keys.Alt) //截获Ctrl+Alt+空格 //{ // return 1; //} } return CallNextHookEx(hHook, nCode, wParam, lParam); } #endregion public Form2() { InitializeComponent(); } private void Form2_Load(object sender, EventArgs e) { Hook_Start(); //通过修改注册表来屏蔽任务管理器 //try //{ // RegistryKey r = Registry.CurrentUser.OpenSubKey("Software\\Microsoft\\Windows\\CurrentVersion\\Policies\\System", true); // r.SetValue("DisableTaskMgr", "1"); //屏蔽任务管理器 //} //catch //{ // RegistryKey r = Registry.CurrentUser.CreateSubKey("Software\\Microsoft\\Windows\\CurrentVersion\\Policies\\System"); // r.SetValue("DisableTaskMgr", "0"); //} } private void Form2_FormClosing(object sender, FormClosingEventArgs e) { Hook_Clear(); } private void Form2_MouseMove(object sender, MouseEventArgs e) { System.Windows.Forms.Cursor.Clip = new Rectangle(this.Location, this.Size); //控制鼠标在窗口范围内 } } }
[解决办法]
你是要屏蔽WINFROM中的某一个控件,还是整个WINFROM,如果是某一个控件的话可以用事件,如果是整个WINFROM可能要用到钩子~
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private void textBox1_KeyDown(object sender, KeyEventArgs e) { if (e.KeyData != Keys.None) { e.SuppressKeyPress = true; } }
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protected override bool ProcessCmdKey(ref Message msg, Keys keyData) { return true; }
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楼上的方法应该能行吧
[解决办法]
http://www.javaeye.com/topic/601061
http://topic.csdn.net/u/20080320/23/576bd398-4804-40be-9886-9afb18ee5cf9.html
[解决办法]
你到底是要屏蔽系统的还是你自己程序的?
[解决办法]
http://blog.sina.com.cn/s/blog_60ddd93f0100ey4l.html
顶
[解决办法]
钩子