I haven't programmed Crystal Reports, and I'm not familiar with the LSS file you're talking about, but I did find this documentation from Seagate; refer to page 352-353: http://dynalivery.com/customersupport/crystaldecisions/CR7TechrefVOL2.pdf. This shows how to declare the PEValueInfo structure (not function), which you then can apparently pass as a parameter to various functions.
If you're trying to declare outside functions and data structures to call from LotusScript, it often helps to search for documentation on calling those functions from Visual Basic, on which the LotusScript language is based.
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