How to monitor process/program execution in windows?

We are trying to develop a small application that can monitor the programs/processes that are executing in a windows machine.

If the program/process is not supposed to run, it should be blocked. It works similar to an antivirus.

This is the basic idea.

I want to know the ways to hook into the OS to get notified about every single program/process trying to run in the machine.

The easiest way is to use WMI. Specifically monitor the Win32_ProcessStartTrace. This is better than Win32_Process, because it is setup to use events whereas Win32_Process requires polling which is more CPU intensive. Below is how to do it in C#. First make sure that System.Management is setup as a reference for your project.

    public System.Management.ManagementEventWatcher mgmtWtch;

    public Form1()
    {
        InitializeComponent();
        mgmtWtch = new System.Management.ManagementEventWatcher("Select * From Win32_ProcessStartTrace");
        mgmtWtch.EventArrived += new System.Management.EventArrivedEventHandler(mgmtWtch_EventArrived);
        mgmtWtch.Start();
    }

    void mgmtWtch_EventArrived(object sender, System.Management.EventArrivedEventArgs e)
    {
        MessageBox.Show((string)e.NewEvent["ProcessName"]);
    }

    private void Form1_FormClosing(object sender, FormClosingEventArgs e)
    {
        mgmtWtch.Stop();
    }

The code will generate a messagebox everytime you launch a new process. From there you can check a whitelist/blacklist and act appropriately.

I havn't tried geting real-time notification. How ever, Here is how to get running processes in C#

using System.Diagnostics;

 //Somewhere in your method

Process[] runningList = Process.GetProcesses();

foreach(Process p in runningList){
Console.WriteLine("Process: {0} ID: {1}", p.ProcessName, p.Id);
}

You can also use the following props of a process

StartTime - Shows the time the process started
TotalProcessorTime - Shows the amount of CPU time the process has taken
Threads - gives access to the collection of threads in the process

I would check up the Win32-api SetWindowsHookEx with the constant WH_GETMESSAGE to add a callback to your program when a new window is being created.

http://pinvoke.net/default.aspx/user32.SetWindowsHookEx

Google that API and WH_GETMESSAGE to find out more.

Also check out the following articles/code librarys: http://www.vbaccelerator.com/home/Vb/Code/Libraries/Hooks/vbAccelerator_Hook_Library/article.asp

http://www.codeproject.com/KB/DLL/hooks.aspx?fid=2061&df=90&mpp=25&noise=3&sort=Position&view=Quick&fr=76&select=726975

来源：https://stackoverflow.com/questions/510372/how-to-monitor-process-program-execution-in-windows

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