From RAD Studio VCL Reference
unsigned short vuDryPecks;
The vuDryPecks variable represents the conversion type for dry pecks.
Use vuDryPecks to convert from another measurement unit to dry pecks.
Note: Do not change the value of vuDryPecks. vuDryPecks contains a handle obtained by a call to RegisterConversionType. Changing the value of vuDryPecks will make volume conversions not work properly.