The main idea behind it was to have Bluetooth enabled when I need it and off when I don't :) It would be great if there was an option in the WM2003 to turn it on automatically when some application is trying to use it...

But since we don't have this option, let's settle on next best thing for a while - define "Turn On" and "Turn Off" lists of applications (windows captions), choose Matching method and decide what to do when Unlisted app is active.

Oh, there's still one more thing left - we need to write an application to follow our directions, stay in tray and ready to be launched at startup.

So... If you like the idea, all you need is just download it and put in \Windows\Startup.

Compatibility list so far (as reported by users):
- Widcomm (BTTrayCE): iPaq hx470x, 221x, 415x, 631x, rx371x, Loox 470, 720.
- Microsoft BT (SDK): XDA II.
- WiFi: iPaq hx470x, 415x, rx371x, Loox 720 - Fully supported.

Update Description:
v0.52:
- Major bugfix in Find Window setup mechanism.
- Cool new icon. Thank You, Jorlin!!!

v0.5:
- Optimized matching code - should be easier on a processor and a battery.
- "Keep PDA On" option (in case when BT is On - specifically, when I turned it on): for people using ICQ or some Nav soft that doesn't have this option implemented.
- Broke "Turn On list" in two - Active & Running.
- Added 'Override "On" List' check to "Turn Off List".
- And added Bluetooth control method option. For now it's just BTTrayCE and MS BT Stack - it hasn't been tested seriously, but hopefully should work.

v0.4:
- Find Window setup mode added, choose it in settings and retrieve complicated window captions by pressing Application Button 1.

SOURCE

http://207.153.195.134/ozbt.html

Reviews:

** [Aug 26, 2005] by Jerry using iPAQ 2210
First impressions were good, but OzBT is too unreliable. I had OzBT set to switch BT on for Connection, PIE and Inbox, but set NOT to switch BT off because I sometimes switch between PIE and Inbox while connected, and if the BT switches off while connected, the Internet connection is dropped and I can't reconnect without rebooting the iPAQ. I close the BT connection manually, when I feel the need. OzBT is good when it works but it is very unreliable. I keep opening PIE, and finding that BT has not been switched on. I have tried all sorts of configuration settings to try to sort this out, but I can't get it work reliably and have now uninstalled it.

***** [Dec 3, 2004] by Paul F. Rhoads using Dell Axim X30i
This is great! I have a BT partnership with my SonyEricsson T637 phone. I use a few applications that go to the web for updates (ie;stocks, weather, news). I used to manually turn on BT, let the apps update the data, then turn off BT (if I remembered). This tool is so cool! It activates BT when I need it, then shuts it off when donw. Saves battery life too! Nice job! Thanks!

**** [Dec 1, 2004] by Dan I. using iPAQ 4150
Good utility... I had configured this to start up my Wi-Fi whenever I run Internet Explorer, WiFiFoFum and Inbox. There is one problem though. If I reset my device and then turn on WiFiFoFum immediately after, the Wi-Fi light comes on, but WiFiFoFum does not detect any networks (even though they exist). However, if I run WiFiFoFum again, without a reset, it works fine.