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How can I programmatically determine if an ActiveX control is installed and disabled or ActiveX in general?

I am using ASP.NET server side and JavaScript client side.

I'm trying to develop some pages to help a user troubleshoot, and I was wondering if there is a way to programmatically determine the following:

  • if ActiveX is disabled in Internet Explorer
  • if an ActiveX control is installed
  • if the ActiveX control is installed but disabled

In cases 2 and 3, I know that in order to detect that an ActiveX control is installed, you must use the following check in JavaScript:

function isActiveXControlInstalled(progId, expectedVersion)
{
    var version;
    try
    {
        var instance = new ActiveXObject(progId);
        version = instance.VersionString;
        instance = null;
    }
    catch (e)
    {
       version = null; // Set version to null, since that is an invalid control version, and the check below will always fail.
    }

    return (version >= expectedVersion);
}

However, this function also returns false if the control is installed but disabled. Can these two cases be distinguished?

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Not. I think if it is installed but disabled then you will not be able to tell from your application. You may want to change the wording on the troubleshooting page to "not installed or disabled".



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