测试点是否落在多边形内，其中包括多边形内岛的判断。此文件使用时必须包含shapefil.h, openshp.c, 和opendbf.c等shape lib中的文件。

用C++编写的进度条，美观，外形和颜色都可以变，有比较详细的注释，希望对大家有用吧-Written in C++ progress bar, beautiful, shape and color can change, there are more detailed comments, want to be useful it

ProjectX is a combined Project produced by a Visual Basic News Group Called Andrea VB Programmers eGroup. What we are doing is providing answers to questions through the format of an application code, this code and application is provided as FREEWARE

Arcgis的shape文件用c#语言读取并显示，目前对点、线和面进行了解析，并在绘图面板中进行了显示-shape file read and display