莫名其妙的编译错误

VC 6.0中的一个网络程序，并没用到数据库的类。为何在编译的时候，会出现很多有关数据库类的错误。程序是从别人的程序中抽取出来的一部分。
我在程序中没有找到有包含dbset.h的文件啊

c:\program files\microsoft visual studio\vc98\include\dbsets.h(68) : error C2065: 'CdbDBEngine' : undeclared identifier
c:\program files\microsoft visual studio\vc98\include\dbsets.h(68) : error C2065: 'pEngine' : undeclared identifier
c:\program files\microsoft visual studio\vc98\include\dbsets.h(68) : error C2065: 'CdbWorkspace' : undeclared identifier
c:\program files\microsoft visual studio\vc98\include\dbsets.h(68) : error C2065: 'pWorkspace' : undeclared identifier
c:\program files\microsoft visual studio\vc98\include\dbsets.h(68) : error C2065: 'CdbDatabase' : undeclared identifier
c:\program files\microsoft visual studio\vc98\include\dbsets.h(68) : error C2065: 'pDatabase' : undeclared identifier
c:\program files\microsoft visual studio\vc98\include\dbsets.h(68) : warning C4229: anachronism used : modifiers on data are ignored
c:\program files\microsoft visual studio\vc98\include\dbsets.h(68) : error C2182: 'SetJet' : illegal use of type 'void'
c:\program files\microsoft visual studio\vc98\include\dbsets.h(68) : error C2491: 'SetJet' : definition of dllimport data not allowed
c:\program files\microsoft visual studio\vc98\include\dbsets.h(68) : error C2078: too many initializers
c:\program files\microsoft visual studio\vc98\include\dbsets.h(69) : error C2143: syntax error : missing ';' before '*'
c:\program files\microsoft visual studio\vc98\include\dbsets.h(69) : error C2501: 'CdbDatabase' : missing storage-class or type specifiers
c:\program files\microsoft visual studio\vc98\include\dbsets.h(69) : error C2370: 'CdbDatabase' : redefinition; different storage class
c:\program files\microsoft visual studio\vc98\include\dbsets.h(69) : error C2501: 'GetDatabase' : missing storage-class or type specifiers
c:\program files\microsoft visual studio\vc98\include\dbsets.h(98) : error C2061: syntax error : identifier 'CdbException'
c:\program files\microsoft visual studio\vc98\include\dbsets.h(192) : error C2146: syntax error : missing ';' before identifier 'm_cRecordset'
c:\program files\microsoft visual studio\vc98\include\dbsets.h(192) : error C2501: 'CdbRecordset' : missing storage-class or type specifiers
c:\program files\microsoft visual studio\vc98\include\dbsets.h(192) : error C2501: 'm_cRecordset' : missing storage-class or type specifiers
E:\试试\试试Dlg.cpp(127) : error C2065: 'CW2A' : undeclared identifier

看看头文件包含了没？