QUESTION
 How may I intercept a 100 or 0 SQLCODE ?

ANSWER
 To check that a VisualAge query successfully retrieved data,
 you can check that the "rows" collection size is greater than
 0.  For example:

     (self rows size = 0)
        ifTrue:(..."SQLCODE = 100 logic")
        ifFalse: (... "SQLCODE = 0 logic")

 where '( )' surrounding the ifTrue and ifFalse code are brackets.