调节系统音量 -- 用C++编写的系统音量调节程序，获取当前音量值，利用设置滚动条的调节音量大小。-Adjust the system volume- with C++ volume adjustment program prepared by the system, to get the current volume level, use the scroll bar to adjust the volume set size.

C#,数独游戏，带界面，可以查看答案，设置难度等级等-C#, Sudoku, with the interface, you can view the answers, set the difficulty level, etc.