This is really a display issue, and would possibly be best done somewhere other than SQL. is_enabled
is clearly a Boolean/YesNo data type, so you can just format it:
SELECT Format(AYesNo,'Yes/No') As ATextYN FROM table1
Or
Format(AYesNo,'True/False')
Format(AYesNo,'On/Off')
All work in VB.Net and return text, not boolean.
See http://msdn.microsoft.com/en-us/library/office/gg251755.aspx