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
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