获取当前活动窗口的标题，并打印在控制台上-Gets the currently active window' s title, and print on the console

vs2015上测试没问题，把鼠标放在指定位置按F1获取窗口信息，输入窗口信息敲回车改变窗口标题-Vs2015 on the test no problem, the mouse on the specified location by F1 to obtain the window information, enter the window information to change the window title