Mach SIx Functions
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 m6_dbEval()        - Optimized version of dbEval() for FOR conditions
 m6_Error()         - Get error code for last command/function
 m6_IsFilter()      - Returns the optimzation level of the active filter
 m6_IsOptimize()    - Measures the optimizability of a FOR expression
 m6_RecCount()      - Returns the number of records found in last query
 m6_RefreshFilter() - Refreshes the current filter on shared files
 m6_SetFilter()     - Hide records not meeting a condition
 m6_SetTemp()       - Set path for temporary files
 m6_Version()       - Returns the Mach SIx version information