

'宣言 Public MustInherit Class C1ExporterBase Inherits Exporter
'使用法 Dim instance As C1ExporterBase
public abstract class C1ExporterBase : Exporter
System.Object
   C1.C1Preview.Export.Exporter
      C1.C1Preview.Export.C1ExporterBase
         C1.C1Preview.Export.C1dExporterBase
         C1.C1Preview.Export.C1mdxExporter