error LNK2019: 未解決的外部符號

原創 cosair 2020-02-20 23:32

寫一個DLL的時候出現如題錯誤，後來 預處理器定義的地方 把 _USERDLL 改成 _AFXEXT即可。 

 

與MFC DLL有關的編譯常數包括：
_WINDLL 表示要做一個用到MFC的DLL
_USRDLL 表示做一個用戶DLL（相對MFC擴展DLL而言） 
_AFXDLL 表示使用MFC動態鏈接庫
_AFXEXT 表示要做一個MFC擴展DLL

 

cosair
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