编译出错！ fatal error LNK1561: entry point must be defined

[sanweiying]

使用ATL,支持mfc。组件内实现了两个接口，编译时出现上述错误。百思不得其解，请高手帮忙！

[joachern]

最好把问题拿出来，有点代码，这种问题解决难，搞不懂头绪

[zhoory]

gz...

[lblyy76]

MSDN，搜索LNK1561,When you build an AppWizard-generated application that has a directory with a trailing backslash (\) specified in the Additional Include Directories field of the C/C++ Preprocessor settings, you receive this error:

The backslash (\) character is interpreted as an escape character
To work around this problem, do not include trailing backslashes in the Additional Include Directories field of the C/C++ Preprocessor settings. For example, specify directories as C:\Project\Inc rather than as C:\Project\Inc\. Or if you want to specify the current directory as .\, use just the period (.) instead.

[o_racle]

gz

[shooterlily]

按照帮助理解，你应该是include目录设得不对，
打开Tools\Options\Directories\include files，看其中有没有最后是\的，
有就去掉它

[sanweiying]

就像lblyy76(yibo)所说，MSDN解释报LNK1561错有两种可能：
1、在“Project setting”中的C/C++ Preprocessor 的Additional Include Directories中包含的路径有类似“C:\Project\Inc\.”的情况，可是我的工程里没有在此增加任何路径；
2、在“Project setting”中的Link的Output中，没有定义entry-ponit symbol，可是加上DllEntryPoint，也没有用。
我这个工程，有时编译报两次这样的链接错误，到第三次又编译通过了。可是现在不知怎么回事，再也不能编译了，总是报这样的错误。郁闷哪