I understand what these signify in the markup of the aspx pages ... but I don\'t not know the full power they can be used for or even the name to denote these special directives
Here (or here - in case it moves again) is a post I found and stashed away some time ago listing all the different inline server-side tags with examples. There are seven:
<%...%> runs normal code<%=...%> is equivalent to Response.Write()<%#...%> is used for databinding expressions<%$...%> returns the value of an expression, and can be used in parameters (note: expressions are not code - see here)<%@...%> is for page directives, usually at the top of the ASPX file<%--...--%> is for comments<%:...%> is the same as <%= except it HTML-encodes the value