Okay I don't wish to sound curt but you really need to start posting at ubbdev.
Searching for a string is simply using a search across all of your files for the subject text that you are looking for to replace or add a insert in a file.
This means not having a file open and search for a pattern of text but to search a whole folder for the text pattern.
So for me I use a utility called grep for windows. Because windows search does not work for files with double extensions such as mysql.inc.php.
