Unable to use dll file in my php application

Question

I have a dll file which encrypts a string, I am trying to use that in my php application. For that I came to know that I have to use COM component, For that I have placed the dll in C:windows/system32 directory and running the regsvr32 command but it is throwing error entry point not found also I try to do the same thing with sysWOW64 directory but facing the same problem.
I have questions in my mind that am I approaching correctly to my problem?

Answer 1

You don't find an entry point because the assembly is a library. Only executable assemblies have an entry point.

Look here: Using a DLL With PHP for Dummies