I believe you are talking about notifications. B4A supports those, but there are also custom libraries that add more features and options. See the one by Barx in the Additional Libraries section to see other options available with the custom libraries.
I'd link to it but I'm using my phone to post this and it is a bit of a hassle to do on a phone.
Other than phone function icons such as WiFi, GPS, 3G, Bluetooth, clock, etc, I have never seen another icon in the status/notification bar up top that was not also in the notifications list when the bar is pulled down. At least that is how my EVO 4G is.
Not saying there isn't a way to put an icon up there without showing it as a notification in the pull-down list, but if so then I don't know anything about that.