Logical 

This is the overview for the Logical constructor overload. 

False 

A constant that implements the False value for the Logical data type. 

True 

A constant that implements the True value for the Logical data type. 

Unknown 

A constant that implements the value Unknown for the Logical data type. 

Unset 

A constant that implements the undefined (unset) value for the Logical data type. 

exists 

Checks whether the Logical object has a defined value (whether the value is set).  

nullify 

Flashes the Logical object to the undefined (unset) value. After calling this method the exists() method returns 0. 

! 

A negation ("NOT") operator for the Logical data type. Inverts the Logical object value:

• from True into False.
• from False into True
• in all other cases the operator returns the Unknown value.

 

!= 

 

&& 

An intersection ("AND") operator for the Logical data type.  

^ 

A "XOR" operator for the Logical data type.  

|| 

A union ("OR") operator for the Logical data type.  

= 

This is the overview for the = operator overload. 

== 

An equality operator for the Logical data type.  

Logical_ 

Casts the Logical object's value to the value of the Logical_ enumeration value. 

OdAnsiString 

Casts the Logical object's value to an ANSI string.