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;
namespace WindowsApplication3 { public partial class Form1 : Form { public Form1() { InitializeComponent(); }
public delegate int HookProc(int nCode, IntPtr wParam, IntPtr lParam); //定义钩子句柄 static int hHook = 0; //定义钩子类型 public const int WH_MOUSE = 7; //定义钩子处理函数 HookProc MouseHookProcedure; [StructLayout(LayoutKind.Sequential)] public class POINT { public int x; public int y; } [StructLayout(LayoutKind.Sequential)] public class MouseHookStruct { public POINT pt; public int hwnd; public int wHitTestCode; public int dwExtraInfo; }
//导入windows Api函数声明,这里要用到的函数有 //SetWindowsHookEx,UnhookWindowsHookEx,CallNextHookEx [DllImport("user32.dll", CharSet = CharSet.Auto, CallingConvention = CallingConvention.StdCall)] public static extern int SetWindowsHookEx(int idHook, HookProc lpfn, IntPtr hInstance, int threadId);
[DllImport("user32.dll", CharSet = CharSet.Auto, CallingConvention = CallingConvention.StdCall)] public static extern bool UnhookWindowsHookEx(int idHook);
[DllImport("user32.dll", CharSet = CharSet.Auto, CallingConvention = CallingConvention.StdCall)] public static extern int CallNextHookEx(int idHook, int nCode, IntPtr wParam, IntPtr lParam);
private void button1_Click(object sender, EventArgs e) { if (hHook == 0) { MouseHookProcedure = new HookProc(Form1.MouseHookProc); //这里挂节钩子 hHook = SetWindowsHookEx(WH_MOUSE, MouseHookProcedure, (IntPtr)0, AppDomain.GetCurrentThreadId());
if (hHook == 0) { MessageBox.Show("SetWindowsHookEx Failed"); return; } button1.Text = "UnHook Windows Hook"; } else { bool ret = UnhookWindowsHookEx(hHook); if (ret == false) { MessageBox.Show("UnhookWindowsHookEx Failed"); return; } hHook = 0; button1.Text = "Set Windows Hook"; this.Text = "Mouse Hook"; }
}
public static int MouseHookProc(int nCode, IntPtr wParam, IntPtr lParam) { MouseHookStruct MyMouseHookStruct = (MouseHookStruct)Marshal.PtrToStructure(lParam, typeof(MouseHookStruct));
if (nCode < 0) { return CallNextHookEx(hHook, nCode, wParam, lParam); } else { String strCaption = "x = " + MyMouseHookStruct.pt.x.ToString("d") + " y = " + MyMouseHookStruct.pt.y.ToString("d"); Form tempForm = Form.ActiveForm;
tempForm.Text = strCaption; return CallNextHookEx(hHook, nCode, wParam, lParam); } }
} }
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