Com Plus Info v1.0

Following is a class I wrote more then a year ago when someone wanted to know what is the COM+ application name behind a specific process id, all he was able to get was 'dllhost.exe' and he wanted needed the specific COM+ application name.

Using the helped class you'll be able to get the PID of an Application Name or the Application Name of a specific PID plus the ability to get all COM+ applications currently running.

Today someone asked me for the same feature... i had to dig a little and i found it... But now i have decided to publish it so it wont get lost again. 

If you find this class useful leave me a note as its nice to hear someone else beside me is using the code in my blog :-)

Update: To use COMSVCSLib namespace you need to add a reference to c:\windows dir\system32\comsvsc.dll

// ComPlus Info v1.0
// (c) Ohad Israeli
//
using System;
using System.Collections;
using COMSVCSLib;
using System.Runtime.InteropServices;

namespace ComInfo
{
    public class ComPlusHelper
    {
        public ComPlusHelper()
        {}

        public static ArrayList GetApplicationList()
        {
            COMSVCSLib.MtsGrp GrpObj = null;
            Type dcomType = Type.GetTypeFromProgID("mts.MtsGrp");
            Object dcomObj = Activator.CreateInstance( dcomType );
            GrpObj = (COMSVCSLib.MtsGrp) dcomObj;
            object obj = null;
            COMSVCSLib.COMEvents eventObj = null;
            ArrayList arr=new ArrayList(GrpObj.Count);
            for (int i = 0 ;i < GrpObj.Count ; ++i)
            {
                GrpObj.Item (i, out obj);
                eventObj = (COMSVCSLib.COMEvents) obj;
                arr.Add(eventObj.GetProcessID()+" : "+eventObj.PackageName);
                Marshal.ReleaseComObject(obj);
                obj = null;
                Marshal.ReleaseComObject(eventObj);
                eventObj = null;
            }
            Marshal.ReleaseComObject( dcomObj );
            dcomObj = null;
            return arr;
       }
       public static int GetPidByName(string strComPlusProgName)
       {
           int returnVal = 0;
           COMSVCSLib.MtsGrp GrpObj = null;
           Type dcomType = Type.GetTypeFromProgID("mts.MtsGrp");
           Object dcomObj = Activator.CreateInstance( dcomType );
           GrpObj = (COMSVCSLib.MtsGrp) dcomObj;
           object obj = null;
           COMSVCSLib.COMEvents eventObj = null;
           for (int i = 0 ;i < GrpObj.Count ; ++i)
           {
                GrpObj.Item (i, out obj);
                eventObj = (COMSVCSLib.COMEvents) obj;
                if (eventObj.PackageName.ToUpper()==strComPlusProgName.ToUpper())
                     returnVal=eventObj.GetProcessID();
                Marshal.ReleaseComObject(obj);
                obj = null;
                Marshal.ReleaseComObject(eventObj);
                eventObj = null;
            }
            Marshal.ReleaseComObject( dcomObj );
            dcomObj = null;
            return returnVal;
       }
       public static string GetNameByPid(int intPid)
       {
            string returnVal = "";
            COMSVCSLib.MtsGrp GrpObj = null;
            Type dcomType = Type.GetTypeFromProgID("mts.MtsGrp");
            Object dcomObj = Activator.CreateInstance( dcomType );
            GrpObj = (COMSVCSLib.MtsGrp) dcomObj;
            object obj = null;
            COMSVCSLib.COMEvents eventObj = null;
            for (int i = 0 ;i < GrpObj.Count ; ++i)
            {
                GrpObj.Item (i, out obj);
                eventObj = (COMSVCSLib.COMEvents) obj;
                if (eventObj.GetProcessID()==intPid)
                    returnVal=eventObj.PackageName;
                Marshal.ReleaseComObject(obj);
                obj = null;
                Marshal.ReleaseComObject(eventObj);
                eventObj = null;
           }
           Marshal.ReleaseComObject( dcomObj );
           dcomObj = null;
           return returnVal;
      }
  }
}

// Usage:
string strComPlusId=ComPlusHelper.GetPidByName(strComPlusName).ToString();

string strComPlusName=ComPlusHelper.GetNameByPid(intComPlusId);