Attached are the source files that you need to compile your own version of Hs_UDef.dll.
We just performed some testing with the Intel Fortran 11.0 compiler, and we found some incompatibilities with the compiler used for the main HyperSizer analysis code. You won't be able to run your version of the Hs_UDef.dll with your current HS version. The next HS release will include the fix for this problem.
For now there should be enough information in the comments of the source files to determine if the current analysis interfaces meet your needs.
-Ryan