bcb6用于复杂图形的绘制，包括了水晶石图案和蜘蛛网图案，利用鼠标绘制图形，动画图形的实现， 综合绘图板实例分析，包括源码和可执行程序-bcb6 used to draw more complex shapes, including rock crystal pattern and spider web pattern, use the mouse to draw graphics, animated graphics implementation, integrated drawing boa