The Lookup References command can be used to quickly find all textual references to the word in the current selection. For example, to find all calls to TextOut, put the insertion point inside of the TextOut word and run the Lookup References command. A Search Results window will be built which will list all references found.
The Browse Project Symbols, Browse Local File Symbols, and Symbol Info dialog boxes also have “References” buttons, which do the same thing. See also “Lookup References”.