使用GDI+技术进行绘制shp数据，绘制出来的shp数据宽度，颜色，表现形式 可以任意变化，shp数据的读取解析过程十分值得学习-Using GDI+ technology to draw SHP data, drawing out the SHP data width, color, performance form can be any change, SHP data read the parsing process is very worthy of study