I have read all references and haven't found a solution on it.
Is there any 3rd-party component in .NET available for doing such a job? such as converting documents (doc, pdf, ppt, xls....) into images?
thank you very much and I'm waiting online...
You may want to take a look at ImageGlue. As for the MS Office formats, I think the files need to have the thumbnail option enabled for ImageGlue to get the preview image.
My company implements a Digital Asset Management system that uses ImageGlue to generate preview images for a lot of different file formats, so it should definitely do the trick.