将最小二乘法拟合程序做成动态链接库DLL文件，然后从VC界面调用该DLL文件。在实际项目应用中，这种方法很实用。-Least squares fitting procedure to create a dynamic link library DLL files, and then call the VC interface DLL file. In the actual project applications, this method is very practical.

这是一个测试动态链接库的实例，对初学者有一定帮助。-This is a test instance of the dynamic link library, there is some help for beginners.