copy textbox's content in a variable

i know this page… ok I try to explain in a better way

1 i need to a text box to insert a value with keyboard, but it is not a problem because it’s so easy to build a textbox

2 after this, i want take the content of that textbox and copy it in a variable,for example with a button event

3 at the end i want to visualize that content in another line…such as in a local testo=display.newText…do you understand?