本实验实现RGB颜色与HLS颜色的相互转换；在此实验中，定义了函数void HSLtoRGB(UINT hue, UINT sat, UINT light, BYTE &r, BYTE &g, BYTE &b）实现HSL向RGB转换；void CPaletteDlg::RGBtoHSL(BYTE r, BYTE g, BYTE b, UINT &hue, UINT &sat, UINT &light)实现RGB向HSL转换-Experimental realization of the R

读取DWG预览图源码，程序根据CAD图形文件DWG图的结构，对图形字节集进行分析读取。(Read DWG preview source program according to the structure diagram CAD DWG drawing file , byte graphic sets for analysis read.)