Hello,
I am trying to access a out of proc DCOM server from a C# client. I need
help on the following:
1) How to get the out value from the out-of proc server?

2) How to get the HRESULT value returned by any interface call?

Below is a detail description about the problem:

I need to access a DCOM component using a C# client. This is possible by
adding a reference or by using Type and Activator. The DCOM server is
running on a different PC, so it can't be accesses by adding a reference.
Hence I am using Type and Activator as follow
static void TestMathServer()

       {

           try

           {

               Type objType =
Type.GetTypeFromProgID("MathServer.MathOperations", "PC_MathServer");

               if (objType == null)

                   Console.WriteLine("Failed to get object");

               object objMathServer = Activator.CreateInstance(objType);

               int nTemp = -1;

               pValue = (IntPtr)nTemp;

               object[] objArguments = { 1, 1, pValue };

               object objReturn = objType.InvokeMember("AddInt",
System.Reflection.BindingFlags.InvokeMethod, null, objMathServer,
objArguments);

               Console.WriteLine("method AddInt called");

           }

           catch (COMException ex)

           {

               Console.WriteLine("COM Exception:" + ex.Message);

           }

           catch (Exception ex)

           {

               Console.WriteLine("General Exception:" + ex.Message);

           }

       }

The signature of the Add method exposed by DCOM server is as follows:

HRESULT AddInt([in]int nVal1,[in]int nVal2,[out]int *nSum);

Now with the above code, the AddInt method will be called.

But I am not able to retrieve the sum returned by the out parameter
(,[out]int *nSum) and am not able to get the HRESULT value also.

Any solution for the above problem will be greatly appreciated.

Thanks and regards,

Mahesh