Value :: isEmpty - Is property instance empty?
The function returns whether the value handle contains data ( false ) or not ( true ). A value is considered as empty when:
- the value is false ( LOGICAL )
- the value is 0 ( INT , REAL , Enumeration, Date , Time , DateTime )
- the value is "" ( CHAR , STRING , CCHAR , MEMO )
- when all properties are empty (for complex data type properties)
The property throws an exception, when the property handle is not valid.
Return value: Success ( bool )
The value is true when the function was executed successfully. Otherwise the value is set to false .