C++: Using Text in the XAML Textboxes

This is to push my blog post from Dec. up to the class at CSULA.

https://blogs.msdn.com/b/devschool/archive/2012/10/09/a-clear-and-simple-way-to-convert-a-string-to-integer-in-c-cx.aspx

We will use this information again in class (since I know it works).