Well I know this is going to embarass you, but try the HELP built in to BCB. It's all in there. The AnsiString objects have a whole bunch of functions in them.
PRESS F1 with the cursor on ANSISTRING to get help on it.
You'll get the base object and a description in the help. Then you will see the following menu options
Methods Example
in the help..
CLICK METHODS
and you'll get a list next to the help screen of all the methods.. LOOK at them carefully.
Not all objects are the same, I suggest you learn how to use the BCB help for finding things, it will save you lots of time
How did you get BCB6 enterprise? it's like $3500 for me

Cyb