1. 设置：项目属性->general->configuration type-> dynamic libray(.dll)
2. 添加lib，项目属性->Linker->input->Additional Dependencies-> libmex.lib libmat.lib libmx.lib
3. 添加def文件：source->Add new items->Module-Definition File(.def)，然后编辑该def文件为以下内容：
LIBRARY "output_name"
EXPORTS mexFunction
Done! 