JaWin and retrieving data from COM objects

hey, I am new to JaWin and think it looks to be very impressive, but I have
a question.  I am attempting to pull a string out of a dll function call, my
code invokes FuncPtr which seems to only return integers?  I assume this
isn't a limitation of JaWin because the documentation claims it can call any
COM functions/objects.
  My code looks like:
       FuncPtr webencrypt = new FuncPtr("MYDLLNAME.DLL",
"FunctionThatReturnsString");
       webencrypt.invoke(querystring, ReturnFlags.FAIL_ON_FALSE);

How would I retrieve a string in JaWin, because it isn't going to happen
through the FuncPtr class?  I need to be pulling a string out of the
".invoke" part of that code.