Introduction - If you have any usage issues, please Google them yourself
This program is divided into two parts, the first part of DllClassText create an extended DLL in MFC, there are two classes for the calculation of addition and subtraction, and the other to use the OPENCV way to open the picture, the parameters of the picture path. The second part of dllClassApp MFC dialog program, call the first part of the generated DllClassText.dll realization of addition and subtraction and display pictures feature