If it is recognized by VBA as a date, the cdate or cvdate functions should work. If the string does not look like a recognizable date, for instance 122804, you may have to use some of the string manipulation functions to retrieve parts of the string:
[tt]mydate=dateserial(mid(strDt,5,2), mid(strDt,3,2), left(strDt,2))[/tt]
Roy-Vidar