Select & Delete text in TextBox1 also deletes text in TextBox2

Hi.

I have a form with 2 textboxes on it, named TextBox1 and TextBox2.

When the form runs there is some text, (e.g. the letters "abcd") appearing in both textboxes.

I want to be able to:
select all the text in TextBox1,
delete it,
and then automatically the text in TextBox2 is deleted as well.

Please could someone tell me if this is possible.