大侠帮小弟我看看。连接时出错，如何改

大侠帮我看看。连接时出错，怎么改？
error LNK2001: unresolved external symbol "protected: static long (__stdcall* CpreparentDlg::wpListProc)(struct HWND__ *,unsigned int,unsigned int,long)" (?wpListProc@CpreparentDlg@@1P6GJPAUHWND__@@IIJ@ZA)
preparentDlg.obj : 

error LNK2001: unresolved external symbol "protected: static struct HWND__ * CpreparentDlg::hPrvWnd" (?hPrvWnd@CpreparentDlg@@1PAUHWND__@@A)
Debug/com_vc.exe : fatal error LNK1120: 2 unresolved externals
执行 link.exe 时出错.

------解决方案--------------------
头文件没加好，检查下
------解决方案--------------------
清除，重新编译下，是不是函数只有申明没有定义