If you're looking for an interlinked document, the closest you'll get is the HL Wiki. This does cover the majority of generic scripting information. However, this does NOT include game-system specific information, such as fields, tags, or macros used only within Pathfinder data files.
Some of the game-system specific information is available by accessing the "Help on Using the Editor" link within the Editor, but the vast majority is not. As mentioned, the best way to find the answers is to identify things that do something similar to what you want, and then take a look at that thing in the editor. I've found many of the users on the forum to be helpful in identifying where to look.
Also, keep in mind that Lone Wolf is a small business (I assume) with a limited user base, of which only a small portion are building custom content, whereas Microsoft, even in the long-long-ago when someone actually used vbscript, is a global corporation with an extensive developer community.