Convert Documents to Images, doc, docx, pdf, ppt... -> .jpg -- 2

Convert documents to images, doc, rtf, ppt, pdf, docx, pptx, rtfx. -> .jpg This winform tool, it read all documents in a folder and subfolder and convert it to image files. Input: A root folder contain many documents and subfolder can contain many documents or subfolders. Output: All images convert from the documents store in the root folder has congfiged, keep the struct of directory same with struct of document (after root folder) Requirements: - Use Visual Studio 2010 or Visual studio 2013 (Winform project). - One page from document will convert to a image. For example if a doc file (named: [login to view URL]) have 12 pages so will converted to 12 images with name [login to view URL], abc_2.jpg... - Must support the following document formats: MS Office (.doc, .docx, .ppt, .pptx) and .pdf, .txt, .rft - Document can contain images or the math formula. Result images keep all as the input document. - Can config the max number pages to convert. (ignore pages after maximum pages reach) - can config the width of result images, default is 1200px. - high of result image is auto scale base on width. - In the Convert function with return number pages of document need convert. - Write .txt log file if have any exceptions. - Working fine with the unicode doucument. Output images files have same style and can read same original document. - Don't use the commerce library - Open sources or other printer driver (no require license) are accepted. - Demo example files will send later - Can process a million documents (~1TB)