See FoxTools reduce function (Help on FoxTools functions could be found in Download section here by George Tasker).

\>>I was trying to search for "listbox movebars" and messagebox poped up with message "The search field should contain at least three characters". It took me awhile to realize that there where two spaces between "listbox" and "movebars" instead of one because the message was misleading.
>
>BTW, I'm looking for the best technique to convert the string entered by the user to a one space for each occurence. For example, 4 words might be entered and 3 spaces might appear between the 3rd and 4th word. Basically, it should end up with only one space. I trying to find the best approach but there seems to be a lot of variations of such implementation.