ToolTip

conversion of a matrix into lower triangular matrix

sod88是北京理工大学开发的一款光学设计软件，dos界面，但初学还是很有用的。(sod88，optical design)

NURBS曲线绘制C程序

使用vc++开发的云台镜头控制系统，主要通过串口实现控制，已编译通过，可学习使用(PTZ camera control system)

要程序是利用DirectSound开发包进行编程的例了，希望能够给学习DirectSound编程的朋友一些帮助。(procedures to be used for DirectSound Development Kit Programming cases, I hope to be able to learn programming DirectSound friends help.)

说明：  使用MFC对图元文件进行操作，包括保存图元文件，使得变换窗口的时候图像不消失(The use of MFC to operate metafile, including the preservation of metafile which transform the window does not disappear when the image)

转载mfc下osgEarth工程，sdk 版本osgEarth 2.7 32bit，vs2015编译(osgEarth Project under Reprinted MFC)

文本文件操作，C#练习源码，很好的学习资料。(Text file operations, C# source code, very good learning materials.)

C程序设计之四书五经，适合初学者学习C程序设计的一些规范，推荐。(C program design Four Books and Five Classics, for beginners learning the C program design parameters recommended.)

程序中通过farpoint控件来操作Excel中的数据，然后用TeeChart根据表中的数据画图，还有皮肤的哦！ (The program through farpoint controls to manipulate the data in Excel, and then according to the data in the table with TeeChart drawing, as well as skin Oh!)