Net Document Annotation API. View, tag, comment & annotate PDF Word DOCX, Excel XLSX, PPTX, EML EMLX, VSS VSD, OTP, CAD & image file formats....PowerPoint presentations, Visio, Outlook emails, images, metafiles,..., PPSM , PPTM , WMF , EMF Outlook : EML , EMLX , MSG Visio :...