This function retrieves the reaction force from a flat guide surface in a particular degree of freedom, at a particular time step.
GetFlatGuideReaction (string DatabaseName, int TimeIndex, int guideNo, int DOFNo)
DatabaseName (character string). The full path name to the relevant database.
TimeIndex (integer). The relevant time index.
guideNo (integer). The relevant guide index number.
DOFNo (integer). The Degree of Freedom (1 to 3).
-9999998 (if the specified database is invalid)
-9999999 (if the requested value cannot be retrieved from the database)