link时出现问题，这是怎么回事啊？

ghdriverbbs

--------------------Configuration: testUSB - Win32 Debug--------------------
Linking with DDK linker...
LINK : warning LNK4224: /PDBTYPE is no longer supported;  ignored
ScrollerCtrl.obj : error LNK2019: unresolved external symbol __RTC_CheckEsp referenced in function "public: __thiscall CScrollerCtrl::CScrollerCtrl(void)" ([email=??0CScrollerCtrl@@QAE@XZ]??0CScrollerCtrl@@QAE@XZ[/email])
testUSB.obj : error LNK2001: unresolved external symbol __RTC_CheckEsp
testUSBDlg.obj : error LNK2001: unresolved external symbol __RTC_CheckEsp
ScrollerCtrl.obj : error LNK2001: unresolved external symbol __RTC_Shutdown
testUSB.obj : error LNK2001: unresolved external symbol __RTC_Shutdown
testUSBDlg.obj : error LNK2001: unresolved external symbol __RTC_Shutdown
ScrollerCtrl.obj : error LNK2001: unresolved external symbol __RTC_InitBase
testUSB.obj : error LNK2001: unresolved external symbol __RTC_InitBase
testUSBDlg.obj : error LNK2001: unresolved external symbol __RTC_InitBase
ScrollerCtrl.obj : error LNK2019: unresolved external symbol @_RTC_CheckStackVars@8 referenced in function "public: void __thiscall CScrollerCtrl::SetFont(class CString const &,int,int)" ([email=?SetFont@CScrollerCtrl@@QAEXABVCString@@HH@Z]?SetFont@CScrollerCtrl@@QAEXABVCString@@HH@Z[/email])
testUSB.obj : error LNK2001: unresolved external symbol @_RTC_CheckStackVars@8
testUSBDlg.obj : error LNK2019: unresolved external symbol @_RTC_CheckStackVars@8 referenced in function "protected: virtual int __thiscall CAboutDlg::OnInitDialog(void)" ([email=?OnInitDialog@CAboutDlg@@MAEHXZ]?OnInitDialog@CAboutDlg@@MAEHXZ[/email])
Debug/testUSB.exe : fatal error LNK1120: 4 unresolved externals
Error executing link.exe.
testUSB.exe - 13 error(s), 1 warning(s)