I updated my plugin. Is in spanish but you'll get the idea.
Please, tested in your OS.
Since is using atof
(VC++ runtime function) it will need MSVCRT.DLL (Win95 users: You must have Win95 OS-2 or IE 4.x installed; IE 5.x just to be sure).
Autor -> Returns the author
GetDLLVersion -> plugin version
Suma -> Add numbers
Resta -> Substract numbers
Multiplica -> Multiplie numbers
Divide -> Divide numbers