C# List currently open files and programs

Question

Is there a way I can get a list of all open applications and a list of all open files? For the files I only need the files that I opened (documents etc) not OS's open system files. The same for the applications (only browsers, document processors etc).

I already tried various functions from the Windows API like EnumWindows but I couldn't get what I wanted.

An example of what my ultimate goal would be, is to have lists like this:

Applications

Microsoft Word, Notepad, Mozilla Firefox

Files

foo.txt, foo.mp3, foo.doc

What I need is just the names, I don't need handles etc (even though I'm sure I'll have to use them to get what I want)

Answer 1

You can get a list of running processes with their information

public static string ListAllProcesses()
{
    StringBuilder sb = new StringBuilder();

    // list out all processes and write them into a stringbuilder
    ManagementClass MgmtClass = new ManagementClass("Win32_Process");

    foreach (ManagementObject mo in MgmtClass.GetInstances())
    {
        sb.Append("Name:\t" + mo["Name"] + Environment.NewLine);
        sb.Append("ID:\t" + mo["ProcessId"] + Environment.NewLine);
        sb.Append(Environment.NewLine);
    }
    return sb.ToString();
}

The only method (That I know) to see if the process is opened by user or system is to check it's owner. If it's system, then it's not run by user:

//You will need to reference System.Management.Dll and use System.Management namespace
public string GetProcessOwner(string processName)
        {
            string query = "Select * from Win32_Process Where Name = \"" + processName + "\"";

            ManagementObjectSearcher searcher = new ManagementObjectSearcher(query);
            ManagementObjectCollection processList = searcher.Get();

            foreach (ManagementObject obj in processList)
            {
                string[] argList = new string[] { string.Empty, string.Empty };
                int returnVal = Convert.ToInt32(obj.InvokeMethod("GetOwner", argList));
                if (returnVal == 0)
                {
                    // return DOMAIN\user
                    string owner = argList[1] + "\\" + argList[0];
                    return owner;
                }
            }

            return "NO OWNER";
        }

For the list of opened files, It is possible to do using Managed Code which is somehow hard. Here is an example on codeproject demonstrating the same matter