AX / Dynamics 365 For Finance and Operations blog

If you want to add a default value in a RunBase dialog field you can use dialog.addFieldValue() in the dialog() method :

public Object dialog()

{
   
dialog = super();

   
dialog.addGroup("@SYS7764");

   
dialogCurrency = dialog.addFieldValue(ExtendedTypeStr(CurrencyCode), 'EUR', "Currency");

   
return dialog;

}