unresolved external symbol ProUtilWstrcpy

Hi, I'm using piece of code from UginterfaceExport.c located in C:\Program Files\PTC\Creo 9.0.5.0\Common Files\protoolkit\protk_appls\pt_userguide\ptu_interface\UgInterfaceExport.c. While building application I got below error,

Error LNK2019 unresolved external symbol ProUtilWstrcpy referenced in function "int __cdecl UserNewShrinkwrapCreate(void)" (?UserNewShrinkwrapCreate@@YAHXZ)

Error LNK2019 unresolved external symbol UserPromptUI referenced in function "int __cdecl UserNewShrinkwrapCreate(void)" (?UserNewShrinkwrapCreate@@YAHXZ)

What could be done to solve this? I explored similar questions in community portal and tried the solution, all didn't work.