MSSOAP的编译错误，请问怎么解决

[flyinges_zh]

c:\program files\microsoft visual studio\vc98\include\comdef.h(695) : error C2065: 'IAsyncSetup' : undeclared identifier
c:\program files\microsoft visual studio\vc98\include\comdef.h(710) : error C2065: 'IClassAccess' : undeclared identifier
c:\program files\microsoft visual studio\vc98\include\comdef.h(712) : error C2065: 'IClassAdmin' : undeclared identifier
c:\program files\microsoft visual studio\vc98\include\comdef.h(715) : error C2065: 'IClassRefresh' : undeclared identifier
c:\program files\microsoft visual studio\vc98\include\comdef.h(750) : error C2065: 'IEnumClass' : undeclared identifier
c:\program files\microsoft visual studio\vc98\include\comdef.h(762) : error C2065: 'IEnumPackage' : undeclared identifier
c:\program files\microsoft visual studio\vc98\include\comdef.h(1078) : error C2065: 'IXMLElementNotificationSink' : undeclared identifier
E:\work\OAProtect\Auth_SecDocClient\Auth_SecDocClient.cpp(72) : error C2065: 'string' : undeclared identifier
E:\work\OAProtect\Auth_SecDocClient\Auth_SecDocClient.cpp(72) : error C2146: syntax error : missing ';' before identifier '_wsURL'
E:\work\OAProtect\Auth_SecDocClient\Auth_SecDocClient.cpp(72) : error C2065: '_wsURL' : undeclared identifier
E:\work\OAProtect\Auth_SecDocClient\Auth_SecDocClient.cpp(73) : error C2146: syntax error : missing ';' before identifier '_wsNameSapce'
E:\work\OAProtect\Auth_SecDocClient\Auth_SecDocClient.cpp(73) : error C2065: '_wsNameSapce' : undeclared identifier
E:\work\OAProtect\Auth_SecDocClient\Auth_SecDocClient.cpp(74) : error C2146: syntax error : missing ';' before identifier '_wsMethodName'
E:\work\OAProtect\Auth_SecDocClient\Auth_SecDocClient.cpp(74) : error C2065: '_wsMethodName' : undeclared identifier

[雪影]

检查一下IDL文件中是否定义这些接口?
否则就是缺少头文件了

[flyinges_zh]

据查，是vc6和vc8的sdk不兼容
我vc6用的是vc8的sdk，
但暂时还在下vc6的sdk，
没验证