Hello,
Well first off, here's a link to the DBC version:
http://forum.thegamecreators.com/?m=forum_view&t=31051&b=5
Generally, you will want the dll in whatever folder your project (your .dba source code) is located. You'll have to use the provided function library and INCLUDE# it in your source code.
Next, if you want to use the DBPro version, which has many more features, I imagine it's possible (I haven't tried it yet - I think I might after I'm done writing this) but there are a few things to consider.
I believe it's written to behave like a plugin for DBPro. That means there is a specific directory for DBPro it has to be placed. Then the dll functions can be referenced without having to make dll calls but just by using the functions as if they were part of the built in commands from DBPro. DBC does not behave this way.
In DBC, you can basically have the DLL anywhere but you'll have to load it into your program using LOAD DLL and you will always call the dll functions using the command
CALL DLL <num>,<function>,<parameters...>
This can of course be placed inside a DBC function or a subroutine. Anyway, since the DBPro version is also written in C++, I believe you'll have to call the functions using the decorated function names in DBC. SO if the function name is
void SC_SetupObject(int,int,int)
it's decorated calling name is:
?SC_SetupObject@@YAXHHH@Z
Last thing, many of the commands are for DBPro specifically and won't work for DBC even if you manage to call the function properly. DBC has no terrain, so that's one right off the bat that won't work.
Enjoy your day.