Windows Mobile引路蜂map开发示例：放大、缩小
Windows Mobile引路蜂地图开发示例：放大、缩小
RasterMap的 zoomIn,zoomOut 用来放大缩小地图。在MainForm中添加两个菜单项mnuZoomIn，mnuZoomOut.
private void mnuZoomIn_Click(object sender, EventArgs e)
{
_rasterMap.ZoomIn();
}
private void mnuZoomOut_Click(object sender, EventArgs e)
{
_rasterMap.ZoomOut();
}