[Typo3] misc questions

[swissair at ground]

i find it hard to find the entry point for problems i face. 
here are questions for which i couldn't figure out a solution myself.

using 3.6.2 but i can upgrade if it helps. 


1) extension callbacks
   can i register a callback for extensions for database changes? i have an 
   ext similar to mininews. now for every insert/update/delete in want a 
   function to be called. i saw that the indexed search is called on all 
   stores... but that is hardcoded.


2) sorting and searching in custom tables
   in the page overview i see my custom db table, defined using
   $GLOBALS['TYPO3_CONF_VARS']['EXTCONF']['cms']['db_layout']['addTables']
   so it looks like the mininews records. is there a switch i can turn on 
   to make the columns sortable? is there a search feature? where do 
   i start to add that?


3) in the setup of my ext. i have a css defined using page.includeCSS. 
   that extension is used on a page. but the css is included on all 
   pages, even if i define a "startingpoint" for it. 


thanks and greetings, fab