on signals in an entry widget

[Chris Clarin <christine clarin gmail com>]

hi all,

i am a beginner in using gtk and i would just like to ask which signal i
should use if i want to "activate" my entry widget on pressing "tab" or when
i leave my entry widget (i.e., i want changes to take place when i hit tab,
return key or when my cursor leaves the entry widget). I tried using
"activate" but it only signals on the return key while "changed" signals
everytime change something. So what could i use to ensure that the text in
my entry widget only takes effect when tab is pressed, or the return key or
when i leave that specific widget?

thank you very much. any help would be greatly appreciated.

christine