CurDirectory( [<cDirectory>] ) --> cPreviousDirectory
ErrorLevel( [<nReturnCode>] ) --> nLastReturnCode
Getenv( <cSetVar> ) --> cString
GetLogicalProcessorCount() --> nLogicalProcessor
Setenv( <cSetVar>, <cValue> ) --> lSuccess
SetLogicalProcessor( [<nLogicalProcessor>] ) --> nOldLogicalProcessor