Re: how to detect VC++ installation

From:

"Doug Harrison [MVP]" <dsh@mvps.org>

Newsgroups:

microsoft.public.vc.mfc

Date:

Wed, 20 Feb 2008 22:23:34 -0600

Message-ID:

<69rpr31o9gfrlovc86g80l9jbt0pqlb5fb@4ax.com>

On Wed, 20 Feb 2008 21:13:27 -0500, Joseph M. Newcomer
<newcomer@flounder.com> wrote:

So you are developing a technology that allows people to create plugins, and this
technology is an enhancement to VC++? Have I understood this correctly?

If so, I'd probably explore the Registry, or I'd try to obtain an automation interface to
VC++. The latter would be more reliable because the automation interface would probably
work well in all versions (that's just a guess on my part). However, how this could be
done is beyond something I can answer without considerably more research, and I know there
are people in this newsgroup that do this every day, and could probably answer it quickly.
joe

Concerning the automation interface, there is VC5/6 and VC7-... Here's what
I use. The following code compiles with VC6, and its #includes assume VC6
is installed to get the definition of CLSID_Application.

**********

#include <comdef.h>

#include <initguid.h>
#include <ObjModel/AppGUID.h>

namespace VC {

bool
IsPresent()
{
   LPOLESTR progID;
   bool const res = SUCCEEDED(ProgIDFromCLSID(CLSID_Application, &progID));
   CoTaskMemFree(progID);
   return res;
}

} // namespace VC

namespace VsNet {

bool
IsPresent()
{
   CLSID clsid;
   return SUCCEEDED(CLSIDFromProgID(L"VisualStudio.DTE", &clsid));
}

} // namespace VsNet

**********

--
Doug Harrison
Visual C++ MVP