Error on Checkstaff

Someone pls can hellp me ?
I got this error:
Error 2315 error LNK2019: unresolved external symbol "public: __thiscall CWndCheckStaff::CWndCheckStaff(void)" (??0CWndCheckStaff@@QAE@XZ) referenced in function "class CWndBase * __cdecl AppMain_WndCheckStaff(void)" (?AppMain_WndCheckStaff@@YAPAVCWndBase@@XZ) FuncApplet.obj

Used the system from Dragon Cross files.

Did you take a look at the code? Its pretty bad and it would'nt show the staff, just the player himself.

Yeah, i changed some parts and create a function for check autorith > general. But the error still continue =/