btw your clock example blocks from the screenshot will not help you to find out, if there still is a connection...
as the bluetooth protocol was designed, there is no way to detect, if a connection still is alive, therefore you have to send regularly (i.e. poll) some data to the device. And if you get an error, then you know, that the connection was lost…
also this
does not make any sense... just
set Label1.Text to "Is connected" there
Taifun
Trying to push the limits! Snippets, Tutorials and Extensions from Pura Vida Apps by 
Taifun.