I am in a Software Engineering class and we're learning how to work with MFC. We're editing a basic calculator app. I don't know how to implement the backspace button (delete a single character from the edit box when the Backspace button is pressed). How is this done? I know that you can emulate character deletion with manipulation of char arrays in C++, but I don't know how you would do this with a number and in MFC. The application uses double integers.