First of all: this is not a duplicate of Delphi and SAPI. I have a specific problem with the \"SAPI in Delphi\" subject.
I have used the excellent Import Type-Librar
You may find interesting to see this CodeRage 4 session on "Speech Enabling Delphi Applications (zip)" You'll get the "how-to" you're looking for... (and I guess you are on Vista or + as the the zero divide did not happend on XP)