Thanks, Mike!

Glad to see you posting in a VFP forum!

>>foo(@value1,@value2)
>>
>>The result is that value1 and value2 come back with a strange value such as 2.63E-308.
>
>I'm a little late to the party on this one, but didn't see that you actually got an answer yet. Go dig up a KB entitled "HOWTO: Pass Structures to a DLL". In that article are two functions that convert strings to (some numeric format that I've forgotten) and back again. Should be at the bottom of the code.
>
>Now, reserve your memory for the variables as strings. IOW, value1=SPACE(255). Pass these by reference, call the function, and let the StringToNum function from the article work it's magic. There even examples of this in the article.
>
>If the two functions don't do the numeric format you want, let me know, I've got others lying around somewhere.