Want to callback C# method from "C++ COM dll"

See more:

C++

C#

COM

marshalling

DCOM

I want to callback C# method from "C++ COM dll", Here is the strategy I took.

Step 1:In C++ Server.dll in idl I declared 2 class Class1 and Class2 as below.

[
       object,
       uuid(54120D45-09DE-4e61-AA30-858CE4C472B5),
       oleautomation,
       helpstring("Class1 Interface"),
       pointer_default(unique)
    ]
    interface IClass1 : IUnknown
    {
      [helpstring("GetCls2Ptr")] HRESULT GetClass2InterfacePtr(IClass2 * ptrCls);
      [helpstring("SayHellow")] HRESULT SayHellow();
    }
    interface IClass2 : IUnknown
    {
      [helpstring("CallMe")] HRESULT CallMe();
    }
    
    In Class1.h
    class Class1 :public IClass1 
    {
      IClass2 **class2Obj;
     STDMETHOD GetClass2InterfacePtr(IClass2 * ptrCls)
      {
        class2Obj= (&ptrCls);
        return S_OK;
      }
    STDMETHOD SayHellow(void)
      {
       (*class2Obj)->CallMe();
       return S_OK;
      }
    }

Step 2:

TlbImp c:\Server.tlb to generate Managed dll [ServerManaged.dll].

Step 3:

refer ServerManaged.dll in C# 

Step 4:

In C# I declared 1 class as below

using ServerManaged;
namespace Test1
{
public class CSClass : IClass2
{
  IClass1 IClass1Obj=null;
  public CSClass()
  {
   //initialising IClass1Obj
   //some code
   //Set Interface objet back to C++
   IClass1.GetClass2InterfacePtr(this);
   //call SayHellow, which inturn will call CallMe() on this
   IClass1.SayHellow();

  }
  void CallMe()
  {
    MessageBox.Show("Hurray I got a call!!");
  }
}

Step 5:
I code is compiling fine, running fine, executing fine, No exception reported

But the problem is I can't say "Hurray I got a call!!" :( 

Thanks in advance