IMPORTANT***
All click-casting code has been removed. Anyone who used WatchDog for it should instead use Clique, which is much better, cleaner, and based entirely off the WatchDog click-casting code. (http://www.wowinterface.com/downloads/fileinfo.php?s=&id=5108)
I repeat. WatchDog is no longer a Click-Casting mod. It is purely a set of unit frames.
*** IMPORTANT***
Watchdog is a highly customizable set of UnitFrames first and foremost. When logging in for the first time, you'll see a single UnitFrame towards the center of your screen. It will display some information about your character, and windows will pop up as party members, pets and targets show up.
You can open the configuration menu by typing /wdog, /wd or /watchdog, depending on what other addons are installed in your system (/wd conflicts with Wardrobe type addons). There are a number of options available on this screen, and I won't explain them all since they'll be changing quite soon.
The format strings (Target Format 1, Player Format 2, etc.) are what defines what is seen on each frame-- and can be customized per type of frame. Format strings are entered using a system of [tags]. A full listing of the tags is available in the readme.txt file within WatchDog.
