9. Open the VB2015\Chap08\State Solution\State Solution (State Solution.sln) file. The interface provides an editable combo box for entering the name of a state. Code the btnAdd_Click procedure so that it removes any leading and/or trailing spaces from the state name. If the name contains at least one character, add the name to the combo box.

The procedure should also send the focus to the combo box. Test the application by entering spaces before and after the following names: South Carolina and Alaska. Also enter only spaces in the text portion of the combo box.