利用列表框设计一个学生课程选项列表清单，在清单的左侧是课程名称、右侧为相应的课时数，通过鼠标选择课程选项，单击确定按钮后，弹出对话框显示用户-Use the list box to design a course option list, in the list on the left is the right course name, number of the corresponding class, the course options through the mouse, click