Thank you, Yacine !
The purpose of my site is to supplement rather than replace the content which you can find on the MSDN site.
For example, in Excel, to enter formulas, you have a form on which you can select the desired function category.
Finding the function you are interested in in the list of functions of a particular category is much simpler than in the full function list.
Each category contains a list of the functions included in it, a description and a syntax of each function.
For more detailed information, please click hyperlink Read more about function <XXX>
About how-tos it is good idea !