link错误求助（附代码）

--------------------Configuration: MyDriver - Win32 MyDriver_Check --------------------
Compiling...
HelloWDM.cpp
Linking...
HelloWDM.obj : error LNK2001: unresolved external symbol __imp__MmAllocateContiguousMemory@12
MyDriver_Check/HelloWDM.sys : fatal error LNK1120: 1 unresolved externals
Error executing link.exe.

相关代码：
    PVOID VirtualAddr;
    PHYSICAL_ADDRESS PhyAddr;
    PhyAddr.u.LowPart = 0xffffffff;
    PhyAddr.u.HighPart = 0;
    VirtualAddr = MmAllocateContiguousMemory(0xffff, PhyAddr);

这是什么错误啊？

搞定啦，是引用的库文件不对，多谢指点！