gets a special property of first selected page
| Parameter | Description | 
|---|---|
| PropertyId | identifier name or number of the property to be set; values are defined in class Eplan::EplApi::DataModel::Properties (in)(obligatory)  | 
| PropertyIdentName | identifier name of the user defined property to be set (in)(obligatory)  | 
| PropertyIndex | if the property has indices, the index; mostly 0 (in)(obligatory)  | 
| PropertyValue | returned value of the property (out)(obligatory)  |