IndexManager :: LocateKeywords - Locate keywords in a keyword search string

The function analyzes the search string and removes not necessary characters and stop words. Than, the function creates a keyword entry (selected property handle) for each keyword.

The function is called usually from Search, but it can also be called explicitly from the application program in order to obtain several result sets (e.g. for different object types).

The function must be called when using SearchByType() instead of Search(). The normalizes search string returned in the nstring parameter can be used as key for storing the result.