Debugging DLL using C++ Builder 1.00 and Delphi 4

I have a application that is written in Delphi 4 and uses a DLL that
is written in C++ Builder Vsn 1.00.  I haven't tried to debug a DLL in C++
builder before and cannot find a way of breaking out in the C++ DLL and then
tracing my way through it.

Can any one give me an idea of how to do it using either C++ Builder
or Delphi 4.

    Regards Terry.