Attach process in code?

Hey so I was asked to make a plugin, that has a toggleable button, which when  pressed, will simulate clicking Tools/Attach to Process/Selecting the "w3wp" process.

It has to select only the w3wp process that's username is contains "Administrator".

I have figured out how to get a list of Processes but I can't for the life of me figure out how to attach the process.

Would love any help with this please and thank you.

Here is the code and methods I have so far!

public void Exec(string commandName, vsCommandExecOption executeOption, ref object varIn, ref object varOut, ref bool handled)
{
	handled = false;
	if(executeOption == vsCommandExecOption.vsCommandExecOptionDoDefault)
	{
		if(commandName == "AutomaticProcessAttacher.Connect.AttachProcess")
		{
                //Need to get the array of proccesses that are called w3wp so we can use that to get only the 				                Administrator version of the process

                    System.Diagnostics.Process[] processArray = System.Diagnostics.Process.GetProcessesByName("w3wp");
                    int processToAttach = ReturnProcessToAttach(processArray);

                    System.Diagnostics.Process proc = System.Diagnostics.Process.GetProcessById(processToAttach);
                    System.Diagnostics.Debugger.Launch();

		    handled = true;
		    return;
		}
	}
}

private int ReturnProcessToAttach(System.Diagnostics.Process[] processArray)
{
       	int processToAttach = 0;

        for (int i = 0; i < processArray.Length; i++)
        {
                string p = GetProcessOwner(processArray[i].Id);
                if (p.Contains("Administrator"))
                {
                    processToAttach = processArray[i].Id;
                    break;
                }
        }

        return processToAttach;
}

public string GetProcessOwner(int processId)
{
        string query = "Select * From Win32_Process Where ProcessID = " + processId;
        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 
                return argList[1] + "\\" + argList[0];
            }
        }

        return "NO OWNER";
}