用VC与DDK合作时的一个错误?

PortNoDlg.obj : error LNK2001: unresolved external symbol __chkesp
Setup.obj : error LNK2001: unresolved external symbol __chkesp
SetupDlg.obj : error LNK2001: unresolved external symbol __chkesp
StatusDlg.obj : error LNK2001: unresolved external symbol __chkesp
Debug/Setup.exe : fatal error LNK1120: 1 unresolved externals
Error executing link.exe.