Ich wrote:
Can anyone tell me how to use a DLL in C++?
This article contains a decent survey of dynamic linking:
Dynamic Libraries in C++
Pete Becker
<http://anubis.dkuug.dk/jtc1/sc22/wg21/docs/papers/2002/n1418.html>
The specifics depend on the platform and the compiler. For example,
these two articles describe the obstacles to sharing DLLs between
Microsoft and Borland:
Using Visual C++ DLLs in a C++Builder Project
<http://www.bcbdev.com/articles/vcdll.htm>
Creating DLLs in BCB that can be used from Visual C++
<http://www.bcbdev.com/articles/bcbdll.htm>