VS error --- appeared: error LNK2005: _DllMain@12 has been defined in *****.obj error

Problems arise:

1>mfcs140d.lib(dllmodul.obj) : error LNK2005: DllMain is already defined in DllMain.obj

Solution:

Project--Properties--c/c++--Preprocessor--Delete _USRDLL in the preprocessing definition

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Origin blog.csdn.net/bigger_belief/article/details/131106431