Delphi .dll in VB5

I am trying to use a dll written in Delphi with Visual Basic 5.0. The
functions are supposed to work with VB5. I am unfamiliar with Delphi
and can't get  VB5 declares to work properly. I get an error #453
--Can't find DLL entry point.

A sample function from the .dll  is as follows:

CSIACC.DLL

function CVSMBF (MBF:single) : single; stdcall; export;

function CVSMBF(MBF:single) :single;
var ptemp : real;
begin
  cvsmbfr(Ptemp,basic_real(MBV));
  result:ptemp;
end;

Does anyone know how to write a VB5 declare which will allow access to
Dlephi  functions?

Any help will be appreciated.

Marv