DSOframer 是微软提供一款开源的用于在线编辑 Word、 Excel 、PowerPoint 的 ActiveX 控件。国内很多著名的 OA 中间件，电子印章，签名留痕等大多数是依此改进而来的-DSOframer is an open source for Microsoft online editing Word, Excel, PowerPoint ActiveX controls. Many of the famous OA middleware, electronic seal,