如何处理C4251警告

[NeedHelpHelpMe]

我在编译Release版程序时出现如下警告
warning C4251: 'g_eventEnd' : class 'CEvent' needs to have dll-interface to be used by clients of class 'SaveAudio'
C:\Program Files\Microsoft Visual Studio\VC98\MFC\INCLUDE\afxmt.h(121) : see declaration of 'CEvent'


在Debug版中没有出现。
运行时Release版会报错，而debug版不会。

请求高人相助，只要解决，分不是问题。

[swbreath]

The specified base class was not declared with the __declspec(dllexport) keyword.

A base class or structure must be declared with the __declspec(dllexport) keyword if a function in a derived class is to be exported.

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[ymbymb]

The specified base class was not declared with the __declspec(dllexport) keyword.

A base class or structure must be declared with the __declspec(dllexport) keyword if a function in a derived class is to be exported.
动态链接库中的输出类和结构必须加上__declspec(dllexport) 关键字, 比如
class __declspec(dllexport) CTest_dll {
public:
CTest_dll(void);
// TODO: add your methods here.
int getValue();
};

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[NeedHelpHelpMe]

但Debug版为什么又没有这个警告？

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[NeedHelpHelpMe]

我找到原因了，谢谢各位

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