吹泡泡：要求用鼠标左键随机在客户区任何地方单击，可产生一个圆形的泡泡（泡泡的大小随机产生）；可通过颜色对话框选择不同的颜色，绘出不同颜色的泡泡；可以保存文档，并能打开文档-Blowing bubbles: require random left mouse button click anywhere in the client area, can produce a circular bubble (bubble the size of the randomly generated)　Color dialog box by selecting different colors, different color paint bubble　can save the document, and can open the document