Changing Defualt Text in Text Box

I am developing a form to get the user's name. I want to put some default text in the textbox where the user types their name. I want the form to delete the default text when the user clicks on the text box or after they start typing their name. I would appreciate any help in this area.

Attached is the form and code that runs the form.

Thanks,

Mark

Many Thanks. that works.