How can I create a DLL to be used by other languages, ie delphi.

I have a project with an class, and a program as main module. The module defines a subclass with the olepublic statment. and I can do dll1.dll from foxpro and I get my messagebox, but if I run:

rundll32.exe c:\test\dll1.dll

From the command line I don't get anything. I also need to know how to create a function for my DLL. I've been experimenting myself but I can't accomplish what I want.

PS: Is this the easyist way to create a small FXP a standalone executable program? Thats what I'm trying to do.