能在一个平面坐标系中画一个五角星，输入指定的坐标点P(x,y)以及这个五角星绕P点旋转的角度a,运行就可以让五角星绕P点旋转的角度a。-In a plane coordinate system in a draw five-pointed star, enter the designated point coordinates P (x, y), as well as the five-pointed star around the P point of rotation angle a, ca

VC++使用GDI控制png图片半透明制作漂亮时钟，GDI库经打包，现在可以在VC6下顺利编译了，不管是作为一个使用PNG图片制作半透明窗体的实例，也可以把它当作一个漂亮的时钟，从运行界面来看，你第一眼一定会感觉吃惊-VC++ using GDI to control the production of beautiful semi-transparent png picture clock, GDI libraries, as packaged, can now be successfully