Yooba is a small company based in Norrköping and they are developing a software tool to easily create and manage applications for iPads and Windows tablets. The environment where to one creates applications is called Yooba Studio and a missing feature that has been requested by their users is a PowerPoint-file importer. PowerPoint, or Microsoft PowerPoint, is a software used to create presentations. To store the presentation data an open XML standard is used called Office Open XML, often shorten OOXML or Open XML. This master thesis will explain how the information inside a OOXML presentation package PPTX can be stored and converted into a new presentation structure, Yooba XML. The thesis work will also explain how an interface, through user tests and prototyping, can be developed to present, for the user, differences when importing between the source program and the final result in Yooba Studio. The developed interface will involve the user in the importation in such way that the user will be the one altering how some of the differences should be imported. The results of this thesis is a working integrated PPTX-file importer where the user can both see statistics over how successful the import were and be able to customize how the final importation result should be.