请大家注意!这种方法只能应用于输出为C格式的__stdcall调用方式！

1. 使用VC++的工具DUMPBIN将DLL中的导出函数表导出到一定义(.DEF)文件
 EXAMPLE：
  DUMPBIN VideoDeCoder.dll /EXPROTS /OUT:VideoDeCoder.def
 
2. 将导出的.DEF文件整理为一符合.DEF个数的函数导出文件
 EXAMPLE：
  VideoDeCoder.DEF 文件内容如下
                                                                
        Dump of file VideoDeCoder.dll                                 
                                                                      
        File Type: DLL                                                
                                                                      
          Section contains the following exports for VideoDeCoder.dll 
                                                                      
                   0 characteristics