本例演示了如何使用CreatePolygonRgn函数建立不规则的热区，PtInRegion判断鼠标是否在热区之内。-the cases demonstrate how to use the function to establish CreatePolygonRgn irregular fever, PtInRegion judge whether the mouse within the hot zone.

是关于mlat多点定位算法的，大家可以下载下载，学习一下。多点定位是个热门的研究课题-Is on the multi-point positioning algorithm mlat, we can download and learn. Multi-point positioning is a hot research topic