Delphi源码实现的不规则窗体，非矩形窗口，绘制一个五角星窗体，大致的实现思路：创建一个多边形的区域，绘制多边形窗体，设置窗体初始背景颜色，使窗体始终保持在最前，设定画笔大小，绘制多边形轮廓线，恢复窗体正常位置和显示属性。-Delphi source code to achieve the irregular form, non rectangular window, draw a star form, ideas to achieve roughly: create a polygon area, draw polygons form, set the form the initial background color, make the window always keep in the former, set the brush size, rendering polygon contour, restore the normal position and the display properties window.