build时碰到的问题，怎么处理啊

Current DDK Directory = E:\\NTDDK
Building for i386
******Configuration: hellowdm - Win32 Checked *************

Invalid keyboard code specified
New or updated MSVC detected.  Updating DDK environment....

Setting environment for using Microsoft Visual C++ tools.
Starting dirs creation...Completed.
BUILD: Object root set to: ==> objchk
BUILD: /i switch ignored
BUILD: Compile and Link for i386
BUILD: Loading E:\\NTDDK\\build.dat...
BUILD: Computing Include file dependencies:
BUILD: e:\\nuance\\v8.0.0\\include\\dispatcher-interfaces.hpp(121): e:\\nuance\\v8.0.0\\include\\dispatcher-interfaces.hpp - invalid include statement: #include <iostream.h>        // cout
BUILD: e:\\progra~1\\micros~3\\vc98\\include\\exdisp.odl(31): e:\\progra~1\\micros~3\\vc98\\include\\exdisp.odl - invalid include statement: importlib(STDOLE_TLB);
BUILD: e:\\progra~1\\micros~3\\vc98\\include\\vidsvr.odl(16): e:\\progra~1\\micros~3\\vc98\\include\\vidsvr.odl - invalid include statement: importlib(STDOLE_TLB);
BUILD: Examining e:\\dn2400c\\win200~1 directory for files to compile.
    e:\\dn2400c\\win200~1
    e:\\dn2400c\\win200~1 - 1 source files (327 lines)
BUILD: Saving E:\\NTDDK\\build.dat...
BUILD: Compiling e:\\dn2400c\\win200~1 directory
Compiling - hellowdm.cpp for i386
BUILD: Linking e:\\dn2400c\\win200~1 directory
Linking Executable - e:\\ntddk\\lib\\i386\\hellowdm.sys for i386
link() : error LNK2001: unresolved external symbol _DriverEntry@8
e:\\ntddk\\lib\\i386\\hellowdm.sys() : error LNK1120: 1 unresolved externals
BUILD: Done

    1 file compiled -   327 LPS
    1 executable built - 2 Errors
Tool returned code: 0

1)你是不是在.cpp中call c语言函数,没有加extern \"c\"
2)你定义的函数在类外部,
3)函数的定义不一致,(通常在.def,与具体的函数中)
,,,,,
 具体的可以参看MSDN, 不知这样的回答对你有没有帮助,

可能没有包含lib文件，或者环境变量设置不对，后者可能性大一些