If Microsoft Visual C++ Redistributable is rolled back or is corrupted after Windows Update, you need to follow the solutions ...
The files will now be download to your computer. Once downloaded, double-click on the downloaded vc_redist.x64.exe file. The Microsoft Visual C++-2015 Redistributable screen will be displayed and ask ...
You probably need to declare area() as PASCAL calling convention and with the EXPORT macro so that it is, indeed, exported from your DLL. You'll also have to defeat C++ "name-mangling", so define it ...