使用c#创建一个可以监视全局鼠标位置的程序

 

 

首先要在焦点不在当前应用程序中也要获得鼠标位置，我们就需要使用全局鼠标钩子

我们先新建一个类库GlobalMouseHook，

然后导入命名空间：System.Windows.Forms;
System.Runtime.InteropServices;

将类重命名为MouseHook，其代码如下：

 

using System.Windows.Forms; using System.Runtime.InteropServices; namespace GlobalMouseHook { public class MouseHook { private const int WM_MOUSEMOVE = 0x200; private const int WM_LBUTTONDOWN = 0x201; private const int WM_RBUTTONDOWN = 0x204; private const int WM_MBUTTONDOWN = 0x207; private const int WM_LBUTTONUP = 0x202; private const int WM_RBUTTONUP = 0x205; private const int WM_MBUTTONUP = 0x208; private const int WM_LBUTTONDBLCLK = 0x203; private const int WM_RBUTTONDBLCLK = 0x206; private const int WM_MBUTTONDBLCLK = 0x209; //全局的事件 public event MouseEventHandler OnMouseActivity; static int hMouseHook = 0; //鼠标钩子句柄 //鼠标常量 public const int WH_MOUSE_LL = 14; //mouse hook constant HookProc MouseHookProcedure; //声明鼠标钩子事件类型. //声明一个Point的封送类型 [StructLayout(LayoutKind.Sequential)] public class POINT { public int x; public int y; } //声明鼠标钩子的封送结构类型 [StructLayout(LayoutKind.Sequential)] public class MouseHookStruct { public POINT pt; public int hWnd; public int wHitTestCode; public int dwExtraInfo; } //装置钩子的函数 [DllImport("user32.dll",CharSet=CharSet.Auto, CallingConvention=CallingConvention.StdCall)] public static extern int SetWindowsHookEx(int idHook, HookProc lpfn, IntPtr hInstance, int threadId); //卸下钩子的函数 [DllImport("user32.dll",CharSet=CharSet.Auto, CallingConvention=CallingConvention.StdCall)] public static extern bool UnhookWindowsHookEx(int idHook); //下一个钩挂的函数 [DllImport("user32.dll",CharSet=CharSet.Auto, CallingConvention=CallingConvention.StdCall)] public static extern int CallNextHookEx(int idHook, int nCode, Int32 wParam, IntPtr lParam); public delegate int HookProc(int nCode, Int32 wParam, IntPtr lParam); /// <summary> /// 墨认的构造函数构造当前类的实例. /// </summary> public MouseHook() { } //析构函数. ~MouseHook() { Stop(); } public void Start() { //安装鼠标钩子 if(hMouseHook == 0) { //生成一个HookProc的实例. MouseHookProcedure = new HookProc(MouseHookProc); hMouseHook = SetWindowsHookEx( WH_MOUSE_LL, MouseHookProcedure, Marshal.GetHINSTANCE(System.Reflection.Assembly.GetExecutingAssembly().GetModules()[0]), 0); //如果装置失败停止钩子 if(hMouseHook == 0 ) { Stop(); throw new Exception("SetWindowsHookEx failed."); } } } public void Stop() { bool retMouse =true; if(hMouseHook != 0) { retMouse = UnhookWindowsHookEx(hMouseHook); hMouseHook = 0; } //如果卸下钩子失败 if (!(retMouse)) throw new Exception("UnhookWindowsHookEx failed."); } private int MouseHookProc(int nCode, Int32 wParam, IntPtr lParam) { //如果正常运行并且用户要监听鼠标的消息 if ((nCode >= 0) && (OnMouseActivity!=null)) { MouseButtons button=MouseButtons.None; int clickCount=0; switch (wParam) { case WM_LBUTTONDOWN: button=MouseButtons.Left; clickCount=1; break; case WM_LBUTTONUP: button=MouseButtons.Left; clickCount=1; break; case WM_LBUTTONDBLCLK: button=MouseButtons.Left; clickCount=2; break; case WM_RBUTTONDOWN: button=MouseButtons.Right; clickCount=1; break; case WM_RBUTTONUP: button=MouseButtons.Right; clickCount=1; break; case WM_RBUTTONDBLCLK: button=MouseButtons.Right; clickCount=2; break; } //从回调函数中得到鼠标的信息 MouseHookStruct MyMouseHookStruct = (MouseHookStruct) Marshal.PtrToStructure(lParam, typeof(MouseHookStruct)); MouseEventArgs e=new MouseEventArgs(button, clickCount, MyMouseHookStruct.pt.x, MyMouseHookStruct.pt.y, 0 ); //if(e.X>700)return 1;//如果想要限制鼠标在屏幕中的移动区域可以在此处设置 OnMouseActivity(this, e); } return CallNextHookEx(hMouseHook, nCode, wParam, lParam); } } } 

 

 

这样就创建了一个全局的鼠标钩子，我们只需要在其它地方引用 这个dll就可以了

使用示例：

 

 

public partial class Form1 : Form { MouseHook mouse = new MouseHook(); public Form1() { InitializeComponent(); mouse.OnMouseActivity += new MouseEventHandler(mouse_OnMouseActivity); mouse.Start(); } void mouse_OnMouseActivity(object sender, MouseEventArgs e) { string str = "X:" + e.X + " Y:" + e.Y; this.Text = str; } }

 

这样这个窗体都可以在全局状态下显示鼠标的位置了，不管你焦点在哪，也不管你焦点是否在当前窗体上

 

转自：http://blog.csdn.net/sohighthesky/archive/2009/04/15/4074757.aspx