Потоки и процессы

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Runtime.InteropServices;
 
namespace WindowsFormsApplication1
{
    public partial class Form1 : Form
    {
        public const uint TH32CS_SNAPHEAPLIST = 0x00000001;
        public const uint TH32CS_SNAPTHREAD = 0x00000004;
        public const uint TH32CS_SNAPMODULE = 0x00000008;
        public const uint PROCESS_QUERY_INFORMATION = 0x00000400;
        public const uint TH32CS_SNAPALL = (TH32CS_SNAPHEAPLIST | TH32CS_SNAPPROCESS | TH32CS_SNAPTHREAD | TH32CS_SNAPMODULE);
 
        [DllImport("kernel32", SetLastError = true, CharSet = System.Runtime.InteropServices.CharSet.Auto)]
        static extern IntPtr CreateToolhelp32Snapshot([In]UInt32 dwFlags, [In]UInt32 th32ProcessID);//Снимок
        private const uint TH32CS_SNAPPROCESS = 0x00000002;
 
        [DllImport("kernel32", SetLastError = true, CharSet = System.Runtime.InteropServices.CharSet.Auto)]
        static extern bool Process32First([In]IntPtr hSnapshot, ref PROCESSENTRY32 lppe);//Первый процесс
 
        [DllImport("kernel32", SetLastError = true, CharSet = System.Runtime.InteropServices.CharSet.Auto)]
        static extern bool Process32Next([In]IntPtr hSnapshot, ref PROCESSENTRY32 lppe);
 
        [DllImport("kernel32.dll")]
        static extern bool Thread32First(IntPtr hSnapshot, ref THREADENTRY32 lpte);
 
        [DllImport("kernel32.dll")]
        static extern bool Thread32Next(IntPtr hSnapshot, ref THREADENTRY32 lpte);
 
        [DllImport("kernel32.dll")]
        static extern IntPtr OpenProcess(uint dwDesiredAccess, [MarshalAs(UnmanagedType.Bool)] bool bInheritHandle, int dwProcessId);
 
        [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Auto)]
        private struct PROCESSENTRY32
        {//Процесс
            const int MAX_PATH = 260;
            internal UInt32 dwSize;
            internal UInt32 cntUsage;
            internal UInt32 th32ProcessID;
            internal IntPtr th32DefaultHeapID;
            internal UInt32 th32ModuleID;
            internal UInt32 cntThreads;
            internal UInt32 th32ParentProcessID;
            internal Int32 pcPriClassBase;
            internal UInt32 dwFlags;
            [MarshalAs(UnmanagedType.ByValTStr, SizeConst = MAX_PATH)]
            internal string szExeFile;
        }
 
        [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Auto)]
        public struct THREADENTRY32
        {//Потоки
 
            internal UInt32 dwSize;
            internal UInt32 cntUsage;
            internal UInt32 th32ThreadID;
            internal UInt32 th32OwnerProcessID;
            internal UInt32 tpBasePri;
            internal UInt32 tpDeltaPri;
            internal UInt32 dwFlags;
        }
 
        static THREADENTRY32 ThreadEntry = new THREADENTRY32();//Поток
        static PROCESSENTRY32 ProcEntry = new PROCESSENTRY32();//Процесс
        static IntPtr Snapshot = CreateToolhelp32Snapshot(TH32CS_SNAPALL, 0);
        public Form1()
        {
            InitializeComponent();
        }
 
        private void Form1_Load(object sender, EventArgs e)
        {
 
        }
 
        private void button1_Click(object sender, EventArgs e)
        {
            ProcEntry.dwSize = (UInt32)Marshal.SizeOf(typeof(PROCESSENTRY32));
            Process32First(Snapshot, ref ProcEntry);
 
            ThreadEntry.dwSize = (UInt32)Marshal.SizeOf(typeof(THREADENTRY32));
 
            while (Process32Next(Snapshot, ref ProcEntry))
            {
                listBox1.Items.Add(ProcEntry.szExeFile);
                if (ProcEntry.cntThreads > 0)
                {
                    Thread32First(Snapshot, ref ThreadEntry);
                }
            }
        }
 
        private void listBox1_MouseClick(object sender, MouseEventArgs e)
        {
            ProcEntry.dwSize = (UInt32)Marshal.SizeOf(typeof(PROCESSENTRY32));
            Process32First(Snapshot, ref ProcEntry);
 
            ThreadEntry.dwSize = (UInt32)Marshal.SizeOf(typeof(THREADENTRY32));
            while (Thread32Next(Snapshot, ref ThreadEntry))
                {
                    if (listBox1.SelectedItem.ToString() == ProcEntry.szExeFile.ToString())
                    { listBox2.Items.Add(ThreadEntry.th32ThreadID.ToString()); }
                    else { Process32Next(Snapshot, ref ProcEntry); }
                }
        }
 
    }
}