Visio Stencil File .vssx are drawing stencils created with Microsoft Visio 2013 and above. The VSSX file format can be opened with Visio 2013 and above. Visio files are known for representation of a variety of drawing elements such as collection of shapes connectors flowcharts network layout UML diagrams Learn more about this file format herehttps//wiki.fileformat.com/image/vssx....namespace GroupDocs.Viewer assembly GroupDocs.Viewer VSSM VST...