The toolbar family of articles describes MFC toolbars and how to create and use them.
What do you want to know more about?
- How to Update User-Interface Objects (enable/disable toolbar buttons) 
- The CToolBar and CToolBarCtrl classes 
For more information about MFC toolbars, see article Q232017, "HOWTO: Add Text to Toolbar Buttons," in the Microsoft Knowledge Base at https://support.microsoft.com.