Sorry bud, I'll admit I'm ignorant on this but I have no clue what this is about and I'm sure I'm not alone in this. You'll find your contributions will be long lived if you include the following so people have a clue if your contribution will be helpful to them:

-What is a hashmap?
-Why was this DLL made?
-How does this DLL fit that need?
-Features
-Screenshot/movie if applicable of application working, before and after the DLL is used.
-Step by step of how you implement the DLL into a foreign project.
-Any other points that might be interesting/useful.

If you give people an idea of what they are looking at people will use it and pass it on, otherwise it becomes just another lost contribution.