f$UndefDT (f$NachfrageET)

f$UndefDT (f$NachfrageET)

Assign a special logic as replacement for the automatic value inquiry.

If a parameter that is in UNDEF state is queried in a condition or used in an action (after the equal sign), it will also automatically be queried via a system dialog box. With the f$UndefDT function, an individual logic can be defined which is called in the instance of a value inquiry.

Please note: the parameter name (and also the DT name) are usually given as string constants, i.e. in quotation marks. If a string parameter is entered - like in the syntax description - then the value of the parameter entered is considered as the parameter name (as long as it is a string).