vc2008环境，可将文本格式的文件转换成gpx格式的文件，方便加载GPS软件mapsource里面显示，也可方便导入到gps手持仪里面。-vc2008 environment, can convert text file format into a the gpx format the file, and convenient loading GPS software mapsource inside, also can be easily imported into the the gps