buildchk_wxp_x86.err

windows下的程序多线程对文件驱动的读写

filethreaddevice.obj : error LNK2019: unresolved external symbol "public: __thiscall DebugPrint::DebugPrint(char *)" (??0DebugPrint@@QAE@PAD@Z) referenced in function _$E1
filethreaddevice.obj : error LNK2019: unresolved external symbol "public: virtual __thiscall DebugPrint::~DebugPrint(void)" (??1DebugPrint@@UAE@XZ) referenced in function _$E2
filethreaddevice.obj : error LNK2019: unresolved external symbol "public: void __thiscall DebugPrint::DPrint(char *)" (?DPrint@DebugPrint@@QAEXPAD@Z) referenced in function "public: virtual long __thiscall FileThreadDevice::OnStartDevice(class KIrp)" (?OnStartDevice@FileThreadDevice@@UAEJVKIrp@@@Z)
objchk_wxp_x86\i386\filethread.sys : error LNK1120: 3 unresolved externals