DESTester example with Visual C++ 2005

Hi,

I am trying to build the destester example using Visual C++ 2005 Express Edition. However, I have encountered these errors:

DESTester.obj : error LNK2019: unresolved external symbol _okUsbFrontPanel_ReadFromPipeOut@16 referenced in function “bool __cdecl performDES(void *,char * const,char *,char *,bool)” (?performDES@@YA_NPAXQADPAD2_N@Z)
DESTester.obj : error LNK2019: unresolved external symbol _okUsbFrontPanel_IsTriggered@12 referenced in function “bool __cdecl performDES(void *,char * const,char *,char *,bool)” (?performDES@@YA_NPAXQADPAD2_N@Z)
DESTester.obj : error LNK2019: unresolved external symbol _okUsbFrontPanel_UpdateTriggerOuts@4 referenced in function “bool __cdecl performDES(void *,char * const,char *,char *,bool)” (?performDES@@YA_NPAXQADPAD2_N@Z)

…etc

Can someone help me identify the problem?

Thanks.