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detecting if an activeX is installed

NickMalloy asked
Last Modified: 2014-05-01
I'm trying to check if the users have a certain ActiveX installed on there machine. I have found several versions of code My question is what do I put into prodId or Control to find the appropriate ActiveX? I've tried what I though might be it, but it doesn't seem to work. Where do I find the information to plug in?

function AXOrNull(progId) {
  try {
    return new ActiveXObject(progId);
  catch (ex) {
    return null;

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 var plugin = navigator.plugins["control"];
            if (plugin) {
                // Contoso control is installed and enabled
            } else {
                try {
                    plugin = new ActiveXObject("control");
                } catch (e) {
                    // Contoso control is not installed or disabled

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