D's dll and classes

[Hipreme]

I have a plenty of questions related to the DLL things, .di files.

Basically: I have a main program which would contain a lot of 
code. I have a secondary program which I want to call code from 
the main program, but it will be compiled as a DLL to the main 
program call a single entry point from that DLL.

I have been able to call that secondary okay, the problem is that 
the main is linked into the secondary in order to call the main 
program code. That causes problems related to initialization (as 
only the main should care) and a big binary size. I tried writing 
only .di file for it, but then it would only get undefined 
symbol. What I expected is:



A constains code
A.di contains interfacing code

B uses A.di interfacing code
B is compiled as a DLL


A loads B
A calls B