f:\英文vc++\vc6en\vc98\include\ios(9) : fatal error C1083: Cannot open include file: 'streambuf': No such file or directory

应该怎么弄 ?
   我把include目录里全部都弄了streambuf了还是不行啊!!    我把include目录里全部都弄了streambuf了还是不行啊!