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Subj : Application written in Delphi and dll written in BCB
To   : borland.public.cpp.borlandcpp
From : macz <mariusz.czarnecki@poczta.fm>
Date : Tue Jan 20 2004 11:47 pm

Dear all,

I've got application written in Delphi and have to write dll library 
cooperating with it, but I'm writing this dll using C++ (BCB 5.0 Ent).

There are routines declared in application as:
     function func1(PMyInfo Info): integer; stdcall;
     .
     .

PMyInfo is declared there as a pointer to TMyInfo declared as

   TPartInfo = packed record
     Name1 : Char32;
     name2 : Char32;
     Check1 : boolean;
     Check2 : boolean;
     Var1 : double;
     var2 : double;
   end;

   TMyInfo = packed record
     InfoCount : integer;
     MyArray : array [0..Count-1] of TPartInfo;
     Check : boolean;
   end;

My questions are as follow:
1. Is this correct export routine from my dll if I write it as:

extern "C" int __stdcall __declspec(dllexport) Funkcja1(PMojeInfo)

   Is this all I've to do for correct export or do I have to set also 
Calling convention option in Advanced Compiler page? If yes so which one 
  of them? Stdcall? Pascal?

2. Is #pragma pack(1) directive correct way to fit the same sizes of 
packed record and equivalent struct declared in my dll? If yes is this 
enough to use this directive only during type declaration or do I have 
to use this directive also during defining variables and operating with 
this variables?

3. May I use VCL objects in my dll library?

Thank's for help in advance.

P.S. Sorry for my english ;)

Greetings
Mariusz

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