[vbox-dev] Regarding about the LaunchVMProcess in c++ code

[John Lee]

Hello,

I'm trying to employ the usage of the LaunchVMProcess() in c++ for the 
virtual box.

//here is the sample code
nsCOMPtr<ISession> session;
     {
         nsCOMPtr<nsIComponentManager> manager;
         rc = NS_GetComponentManager (getter_AddRefs (manager));
         if (NS_FAILED(rc))
         {
             printf("Error: could not get component manager! rc=%08X\n", 
rc);
             return;
         }
         rc = manager->CreateInstanceByContractID (NS_SESSION_CONTRACTID,
                                                   nsnull,
                                                   NS_GET_IID(ISession),
 
getter_AddRefs(session));
         if (NS_FAILED(rc))
         {
             printf("Error, could not instantiate session object! 
rc=0x%x\n", rc);
             return;
         }

         rc = machine->LockMachine(session, LockType_Write);
         if (NS_FAILED(rc))
         {
             printf("Error, could not lock the machine for the session! 
rc=0x%x\n", rc);
             return;
         }
         rc = session->GetMachine(getter_AddRefs(machine));
         if (NS_FAILED(rc))
         {
             printf("Error, could not get machine session! rc=0x%x\n", rc);
             return;
         }

         rc=machine->LaunchVMProcess(session,sessionType,env,&progress);

     }
nsCOMPtr<IMachine> machine;

The problem formulates at the LaunchVMProcess();

Somehow the VM does not instantiate.

So another method that I have tried to use was declare the machine as 
"IMachine machine;"

Somehow with this methodology, I got the error message that it cannot 
declare variable 'machine' to be a abstract type 'IMachine.'

I'm not sure how to fix this problem. Is there a way to fix the problem?

For further information, I have used the VirtualBox 4.0 SDK and the 
sample code tstVBoxAPILinux.cpp.

Thank you in advance.

Sincerely,
Suk Kyu Lee