using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Runtime.InteropServices;
using System.Diagnostics;
using System.IO;namespace FindOtherComputerIp
{
class lockScreen
{
public delegate int HookProc(int nCode, int wParam, IntPtr lParam); //委托
static int hHook = 0;
public const int WH_KEYBOARD_LL = 13;
//LowLevel鍵盤截獲，如果是WH_KEYBOARD＝2，並不能對系統鍵盤截取，Acrobat Reader會在妳截取之前獲得鍵盤。
HookProc KeyBoardHookProcedure;
//鍵盤Hook結構函數
[StructLayout(LayoutKind.Sequential)]
public class KeyBoardHookStruct
{
public int vkCode;
public int scanCode;
public int flags;
public int time;
public int dwExtraInfo;
}
private GCHandle _hookProcHandle;
[DllImport(@"native.dll")]
public extern static bool FuckSysKey(bool enAble); //禁用alt+ctrl+del //設置鉤子
[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)]
//抽掉鉤子
public static extern bool UnhookWindowsHookEx(int idHook);
[DllImport("user32.dll")]
//調用下壹個鉤子
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); //主進程模塊 [DllImport("User32.dll")]
public static extern IntPtr FindWindowEx(IntPtr ph, IntPtr ch, String cn, String wn);
[DllImport("User32.dll")]
public static extern bool ShowWindow(IntPtr hWnd, long nCmdShow); public const uint spi_screensaverrunning = 97;
[DllImport("user32.dll", CharSet = CharSet.Auto)]
public static extern bool SystemParametersInfo(uint uiAction, uint uiParam, ref bool pvParam, uint fWinIni);
public void Hook_Start()
{
// 安裝鍵盤鉤子
if (hHook == 0)
{
KeyBoardHookProcedure = new HookProc(KeyBoardHookProc);
_hookProcHandle = GCHandle.Alloc(KeyBoardHookProcedure);
hHook = SetWindowsHookEx(WH_KEYBOARD_LL,
KeyBoardHookProcedure,
GetModuleHandle(Process.GetCurrentProcess().MainModule.ModuleName), 0); //如果設置鉤子失敗.
if (hHook == 0)
{
Hook_Clear();
}
}
} //取消鉤子事件
public void Hook_Clear()
{
bool retKeyboard = true;
if (hHook != 0)
{
retKeyboard = UnhookWindowsHookEx(hHook);
hHook = 0;
}
//如果去掉鉤子失敗.
if (!retKeyboard) throw new Exception("鉤子卸載失敗.");
} //這裏可以添加自己想要的信息處理
public static int KeyBoardHookProc(int nCode, int wParam, IntPtr lParam)
{
if (nCode >= 0)
{
KeyBoardHookStruct kbh = (KeyBoardHookStruct)Marshal.PtrToStructure(lParam, typeof(KeyBoardHookStruct));
if (kbh.vkCode == (int)System.Windows.Forms.Keys.Tab && (int)System.Windows.Forms.Control.ModifierKeys == (int)System.Windows.Forms.Keys.Alt) //截獲Alt+Tab
{
return 1;
}
}
return CallNextHookEx(hHook, nCode, wParam, lParam);
}
}
}