Question

How can I programatically detect if MSMQ has been installed on the current system?

I am using C++, but answers in other laguages could still be helpful.

(VS2008, WinXP and up)

Answer 1

You can simply ask COM to create an instance of the MSMQQueueInfo object. If it succeeds you know that MSMQ is installed.

#include <atlbase.h>
#include <mqoai.h>

#include <iostream>
using namespace std;

int main()
{
    auto error = CoInitializeEx(0, COINIT_MULTITHREADED | COINIT_DISABLE_OLE1DDE);

    if (FAILED(error))
    {
        wcout << L"You've got bigger problems" << endl;
    }
    else
    {
        CComPtr<IMSMQQueueInfo> info;

        error = info.CoCreateInstance(__uuidof(MSMQQueueInfo));

        if (SUCCEEDED(error))
        {
            wcout << L"MSMQ is installed" << endl;
        }
    }
}