对CAD的DXF进行读写，是基于MFC对话框编程~很强大-On CAD' s DXF read and write, is based on the MFC dialog box is a powerful programming ~

利用VC实现word文档预览功能，可以将预览嵌入到应用的对话框中。原理是：先调用word的ole接口将doc文件转换为pdf，再利用pdf2swf.exe工具将pdf转换为swf，利用swf进行预览。内有详细的说明文档。(Using VC to implement the word document preview function, you can embed the preview into the dialog box of the application. The principle i