NISE Configuration API for C++

Question

Hi,
is it possible to use NISE Configuration API in C++
I think all need is just a Wrapper-Class
or .tbl
greetings form
the Lake Of Contstance
Juergen
=s=i=g=n=a=t=u=r=e= Click on the Star and see what happens :-) =s=i=g=n=a=t=u=r=e=

Answer 1

Greetings, Juergen!
Bodensee is a beautiful place indeed!
In MSVC++ you can use the #import directive to include the type library of the COM component you'd like to use. The type library for NISE is embedded in the nise.dll, so you can point to the install location of nise.dll to get it. I think that you can also use the ProgID, for more location-independent application. See #import documentation on MSDN for more information.
Here is the code that uses NISE COM API in C++; you can plug it in as is, in a console app, and it works. The vdName ends up being “SwitchExecutiveExample” after clean installation.
A couple of important points:
tlbid(2)  attribute is important, because the COM type library is the second resource in a DLL; the first typelib resource is the NISE C API type library for VisualBasic.
no_namespace means that you can use the smart pointers without specifying namespace.
#include "stdafx.h"
#include "comdef.h"
#import "C:\windows\system32\nise.dll" tlbid(2) no_namespace
int _tmain(int argc, _TCHAR* argv[])
   HRESULT hr = CoInitialize(NULL);
   if (SUCCEEDED(hr))
      VirtualDevicesPtr nise(__uuidof(NiseVirtualDevices)); // creates a smart pointer, no need to destroy this one
      VirtualDevice*  vd; // this will hold a pointer to VirtualDevice interface.
      long numDevices;
      BSTR vdName;
      numDevices = nise->GetCount(); // get the number of virtual devices. You should have one (the example one) after default installation
      vd = nise->GetItem(1); // get the first element in the collection of virtual devices. You can loop from 1 to numDevices if you want to examine the whole system
      vdName = vd->GetName(); //get the name of the first configuration in a collection
      vd->Release(); // vd is not a smart pointer, you should release it. Smart pointers end in "Ptr"
      CoUninitialize();
    return 0;
-Serge
Srdan Zirojevic