浏览对话框允许用户搜索和选择地图文件，这是加载到mapcontrol使用loadmxfile方法。名称每个层内的mapcontrol添加到组合框相同的索引。当一个层是选择在组合框的ilayerfields和艾菲德接口是用于循环通过层领域。名称每个字段添加到另一个框。如果字段名是一样的ifeaturelayer：：displayfield是选择在组合框。是的displayfield外地从ilayer：：tiptext获得和改变可以通过选择不同的字段名从组合。-The browse dialog allows users to search and select map documents, which are loaded into the MapControl using the LoadMxFile method. The Name of each layer within the MapControl is added to a ComboBox at the same index. When a layers Name is selected in the ComboBox the ILayerFields and IField interfaces are used to loop through the layers fields. The Name of each field is added to a second ComboBox. If the field Name is the same as the IFeatureLayer::DisplayField it is selected in the ComboBox. The DisplayField is the field from which ILayer::TipText is obtained and can be changed by selecting a different field Name from the ComboBox.