Where do I find the documentation for the AcroPDF.dll?

When using JavaScript on a webpage it is possible to access the Acrobat Reader Plugin as an ActiveXControl. When doing so there is a list of methods and properties you can call and get/set. There is methods like: postMessage, gotoFirstPage and execCommand. They are all possible to find the name of because they are published through the  AcroPDF.dll. The way to access the AcroPDF.dll in JavaScript on a webpage can be done something like following:

...

<script type="text/javascript" language="javascript">

...

var App = new ActiveXObject('AcroPDF.PDF.1');
App.LoadFile('C:\\Inetpub\\wwwroot\\Res.pdf');

...

</script>
...

These methods and properties are not the same as what you can do through JavaScripting inside a PDF-document. What I have been searching for without luck is the documentaion for is that limited number of methods and properties that is accessible in the AcroPDF.dll.

Where do I find the documentation for exactly the public methods and properties in the AcroPDF.dll - the syntax, format and possible values etc. for each method and property?