http://blogs.msdn.com/ericlippert/archive/2003/09/16/53027.aspxOne of the Fundamental Rules of OLE Automation is that for any object, any two calls to GetIdsOfNames with the same string must return the same number. This is so that callers can fetch the dispid once and reuse it, rather than having to fetch it anewen-USCommunityServer 2.1 SP1 (Build: 61025.2)http://blogs.msdn.com/ericlippert/archive/2003/09/16/53027.aspx#164714Thu, 24 Jun 2004 13:40:00 GMT91d46819-8472-40ad-a661-2c78acb4018c:164714esteeBy the way, Eric, if in IE we're aliasing document.write in the following way: <br> <br>var $=document.write <br> <br>What is the difference now in calling the method itself and it's alias? Does the same invocation (with GetIdsOfNames) take place? <br> <br>Also, seems that such masquerading doesn't work for WScript.Echo. Am i missing something? I thought document and WScript both are of the same ``global'' nature?http://blogs.msdn.com/ericlippert/archive/2003/09/16/53027.aspx#164749Thu, 24 Jun 2004 14:20:00 GMT91d46819-8472-40ad-a661-2c78acb4018c:164749Eric LippertGood question, complicated answer. I've put your question in my &quot;blog about this when you get back from vacation&quot; folder, so expect a follow-up sometime in July.http://blogs.msdn.com/ericlippert/archive/2003/09/16/53027.aspx#455880Thu, 25 Aug 2005 01:30:09 GMT91d46819-8472-40ad-a661-2c78acb4018c:455880Fabulous Adventures In Coding <br>About two years ago I wrote a bit about when it was legal to cache a dispatch identifier so that you...http://blogs.msdn.com/ericlippert/archive/2003/09/16/53027.aspx#4796043Fri, 07 Sep 2007 01:53:28 GMT91d46819-8472-40ad-a661-2c78acb4018c:4796043Fabulous Adventures In Coding<p>About two years ago I wrote a bit about when it was legal to cache a dispatch identifier so that you</p>