c# - Monitor child processes of a process

Question

I'm running .exe file using this code:

Process proc = Process.Start("c:program.exe");
proc.WaitForExit();

If I start Stopwatch before starting the process and stop it after proc.WaitForExit(); line, I can get the time that user was using that particular program.

The problem I'm facing is that some programs (and games) use launchers - some small .exe file that usually checks something and then launches another .exe file that is actually the program/game that the user wants to run. In these cases the code above doesn't work because it returns after launcher exists.

How can I track all processes that proc runs, and wait unitl all of them are terminated?

Answer 1

Here is the solution that the asker found:

public static class ProcessExtensions
{
    public static IEnumerable<Process> GetChildProcesses(this Process process)

    {
        List<Process> children = new List<Process>();
        ManagementObjectSearcher mos = new ManagementObjectSearcher(String.Format("Select * From Win32_Process Where ParentProcessID={0}", process.Id));

        foreach (ManagementObject mo in mos.Get())
        {
            children.Add(Process.GetProcessById(Convert.ToInt32(mo["ProcessID"])));
        }

        return children;
    }
}