yes you can
however probably the LostFocus event of each textbox is not the best event to use to store all values again and again... what about using a button click event?
how do your lists TEXTOS_LEGENDAS and ROTULOS_LEGENDAS look like?
and why do you also set the textboxes not only once, but twice?
you probably also like to initialize your textboxes with the values stored in TinyDB after opening the app next time? you might want to use the Screen.Initialize event for this...
Taifun
Trying to push the limits! Snippets, Tutorials and Extensions from Pura Vida Apps by 
Taifun.