by extending with EXTENDS , [...] _StringExt EXTENDS U_StringBase :

> does not extend __System [...] library has to extend [...] interface does not extend

EXTENDS __SYSTEM.IQueryInterface INTERFACE ITF2 EXTENDS

EXTENDS __SYSTEM.IQueryInterface INTERFACE ITF2 EXTENDS

> does not extend <interface name [...] interface does not extend [...] Extend the interface

is extended. The channel [...] extended) function block [...] extends the existing

) and Extended Structured Text [...] is extended one position [...] is extended one position

is extended by itself [...] EXTENDS FB VAR END

, which is extended by the first [...] 2 EXTENDS XY METHOD METH

, which is extended by the first [...] 2 EXTENDS XY METHOD METH