创建DLL时未解决的外部符号。

A friend of mine gets a bunch of error when creating a DLL. Visual Studio complains about unresolved external symbols. I am mainly an Unix user so I might be mistaken there. On Unix, when you create a static library (an archive), it does not do much more than concatenating the different object files into an archive file. I would expect dynamic objects to be created the same way, but apparently, an extra link stage takes place.A friend of mine gets a bunch of error when cre