For learning how to create your own toolbar, you will modify the application that you
created on Day 10, “Creating Single Document Interface Applications,” the SDI drawing
application, to add a toolbar for selecting the color to use in drawing.
Although the sample application you are working with today is an extension
to the application you built on Day 10, all file and class names have been
changed from Day10 to Toolbar. If you are making the changes in the Day
10 project, then when the following text specifies that you make changes to
the CToolbarDoc class, you should make the changes to the CDay10Doc class.
Likewise, when you are asked to edit the Toolbar.rc file, you can edit the
Day10.rc file.