[求助]获取指定点窗口的PID
我的方法大概是点击按钮后，挂个全局钩子，当鼠标左键点击时，获取点击点所在窗口的句柄，然后由句柄得到窗口的PID.
但是总是不能成功得到pid ，下面是代码！
请大家帮忙！
using System;using System.Collections.Generic;using System.ComponentModel;using System.Data;using System.Drawing;using System.Text;using System.Windows.Forms;using System.Diagnostics;using System.Runtime.InteropServices;using System.IO;namespace getPid{ public partial class Form1 : Form { //鼠标 左右键 private const int WM_LBUTTONDOWN = 0x201; private const int WM_RBUTTONDOWN = 0x204; 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 = 14; //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 [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); [DllImport("user32.dll", EntryPoint = "WindowFromPoint")] public static extern int WindowFromPoint( int xPoint, int yPoint ); [DllImport("user32.dll", EntryPoint = "GetWindowThreadProcessId")] public static extern int GetWindowThreadProcessId( int hwnd, ref int lpdwProcessId ); public Form1() { InitializeComponent(); } private void button1_Click(object sender, EventArgs e) { Process currentProcess = Process.GetCurrentProcess(); if (hHook == 0) { MouseHookProcedure = new HookProc(this.MouseHookProc); //这里挂节全局钩子 hHook = SetWindowsHookEx(WH_MOUSE, MouseHookProcedure, currentProcess.MainModule.BaseAddress, 0); if (hHook == 0) { MessageBox.Show("SetWindowsHookEx Failed"); return; } } } public int MouseHookProc(int nCode, IntPtr wParam, IntPtr lParam) { MouseHookStruct MyMouseHookStruct = (MouseHookStruct)Marshal.PtrToStructure(lParam, typeof(MouseHookStruct)); int w=0; if (nCode < 0) { return CallNextHookEx(hHook, nCode, wParam, lParam); } else { //鼠标左键按下 if (wParam == (System.IntPtr)WM_LBUTTONDOWN) { //释放鼠标钩子 bool ret = UnhookWindowsHookEx(hHook); if (ret == false) { MessageBox.Show("UnhookWindowsHookEx Failed"); return 0; } hHook = 0; //获得鼠标单击窗体的pid MessageBox.Show(GetWindowThreadProcessId( WindowFromPoint (MyMouseHookStruct.pt.x, MyMouseHookStruct.pt.y), ref w).ToString()); } return CallNextHookEx(hHook, nCode, wParam, lParam); } } }}