Does InputField has "lose focus" event?

Hi everyone,

At design time, there is an "onEnter" event for an InputField, does it has "lose focus" event? Can I implemented by coding?

What I want to do is show the description(in a textview) of a key(the inputfield). I need the textview show the description as soon as the user select the valuehelp of the inputfield. Is there any way to do it?

Thank you very much!

Regards,

Xiaoming Yang