You can link the button below for the similar link to this website. Detailed help file in Excel can be studied for better explanation of command use.
http://www.contextures.com/xlDataEntry01.html#Mouse
http://blog.contextures.com/archives/2009/08/10/favourite-free-excel-add-ins/
Macro-Enabled Files vs. Macro-Free Files
http://excelunusual.com/