Return the type of the Double-sized floating point value.
Source position: syshelph.inc line 777
| public function TDoubleHelper.SpecialType: TFloatSpecial; | 
SpecialType checks whether the Double-sized floating point value equals one of several special values, and returns an enumerated value describing which value this is. See TFloatSpecial for an explanation of the possible values.
| 
 | Special floating point values. |