Hi Juan,

I need a little more information on what you are trying to do here. Is this a one-time operation, or recurring? If the former you could simply run a search within the Laserfiche Client and export from there? What sort of format do you need the exported contents to be in? 

Information on exporting documents from the repository through the Laserfiche SDK can be found in the SDK documentation under the 'Tutorial: Importing and Exporting through DocumentServices' section. For example there is an 'Exporting a Document' page as well as one for PDFs specifically.