为什么我的ds不能编译通过?

我有一个文件单独用build指令可以进行编译,但是用ds却不能编译通过,出现如下错误:
Linking...
GIVEIO.OBJ : error LNK2001: unresolved external symbol __imp__MmFreeNonCachedMemory@8
GIVEIO.OBJ : error LNK2001: unresolved external symbol _Ke386SetIoAccessMap@8
GIVEIO.OBJ : error LNK2001: unresolved external symbol _Ke386IoSetAccessProcess@8
GIVEIO.OBJ : error LNK2001: unresolved external symbol __imp__MmAllocateNonCachedMemory@4
.\\objchk\\i386\\give.sys : fatal error LNK1120: 4 unresolved externals
Error executing link.exe.

give.sys - 5 error(s), 0 warning(s)
为什么?

在LINK玄相里家一个ntoskrnl.lib :D :D :D

又出现了如下错误：
--------------------Configuration: give - Win32 Free--------------------
Compiling...
GIVEIO.C
Linking...
GIVEIO.OBJ : error LNK2001: unresolved external symbol __imp__MmFreeNonCachedMemory@8
GIVEIO.OBJ : error LNK2001: unresolved external symbol _Ke386SetIoAccessMap@8
GIVEIO.OBJ : error LNK2001: unresolved external symbol _Ke386IoSetAccessProcess@8
GIVEIO.OBJ : error LNK2001: unresolved external symbol __imp__MmAllocateNonCachedMemory@4
.\\objfre\\i386\\give.sys : fatal error LNK1120: 4 unresolved externals
Error executing link.exe.

give.sys - 5 error(s), 0 warning(s)
--------------------Configuration: give - Win32 Checked--------------------
Compiling...
GIVEIO.C
Linking...
Generating SoftICE Symbol file give.nms
Compuware NM32 Symbol Translator/Loader version 1.24
(C) Compuware  Technologies, 1996-2001
MODULE=.\\objchk\\i386\\give.sys
PROMPT=OFF
SoftICE is not active
Translation of H:\\give\\objchk\\i386\\give.sys successfully completed

give.sys - 0 error(s), 0 warning(s)
为什么呢？

你的驱动里用到这些函数了吗？我没有在DDK中找到？？

如果你知道这个函数的申明形式，那就在自己的程序中自己声明一下吧，如果是CPP文件，要用
extern \"C\"
{
};


象没有公开的函数... :D :D :D