TConvTypeFactor = class(TConvTypeInfo)
class PASCALIMPLEMENTATION TConvTypeFactor : public TConvTypeInfo
TConvTypeFactor describes a single registered conversion type (measurement unit) that differs from its family's base units by a simple conversion factor.
The global RegisterConversionType function creates a TConvTypeFactor instance automatically when you register a conversion type by supplying a conversion factor. TConvTypeFactor implements the FromCommon and ToCommon methods to perform their conversions by using a conversion factor that is the value of the Factor property.
You can, however, use TConvTypeFactor as a base class when implementing your own conversion type that performs addition actions beyond a conversion factor. For example, you could write a class that multiplies by a conversion factor and then shifts the zero point by adding a constant.