VFP7 SP1 Help states, in the DEFINE CLASS command that "For the parameters and their types to appear in a type library, you must use it inline parameter syntax instead of using LPARAMETERS to declare the parameters...".
By the way... earlier, in the same topic under "FUNCTION | PROCEDURE Name[_ACCESS. . ." it says "Note the use of an LPARAMETERS statement to accept the value...".

Now the entry for LPARAMETERS command proper makes no mention whatsoever of the restriction noted under DEFINE CLASS. Clearly the most utilitarian place to publicize the restriction, assuming that it can only be mentioned in one place, is in the LPARAMETERS command entry. Optimally, it could be described in both places.