unsigned short auSquareDecameters;
The auSquareDecameters variable represents the conversion type for square decameters.
Use auSquareDecameters to convert from another measurement unit to square decameters.
Note: Do not change the value of auSquareDecameters. auSquareDecameters contains a handle obtained by a call to RegisterConversionType. Changing the value of auSquareDecameters will make area conversions not work properly.