6.1 Introduction
 6.2 Constants, types and variables
   constants
   Types
   Variables
 6.3 Functions and procedures
   Gpm____AnyDouble
   Gpm____AnySingle
   Gpm____AnyTriple
   Gpm____Close
   Gpm____FitValues
   Gpm____FitValuesM
   Gpm____GetEvent
   Gpm____GetLibVersion
   Gpm____GetServerVersion
   Gpm____GetSnapshot
   Gpm____LowerRoi
   Gpm____Open
   Gpm____PopRoi
   Gpm____PushRoi
   Gpm____RaiseRoi
   Gpm____Repeat
   Gpm____StrictDouble
   Gpm____StrictSingle
   Gpm____StrictTriple