See the CVF sample "Arrays" in "... DF98SAMPLESMIXLANGVBARRAYS" for a sample that demonstrates how to pass arrays of strings from VB to VF. Note that the sample doesn't limit itself to fixed size strings.
You can also check our f90VB User Manual, which has detailed explanations of how VB (and VBA) represents arrays of characters, as well as examples of how to handle them in Fortran. The examples use f90VB, but with a little work you should be able to get them working using only CVF's extensions. The on-line user manual is at http://www.canaimasoft.com/f90VB/OnlineManuals/Default.htm
