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****************************************** testdll1.prg
#include "FiveWin.ch"
FUNCTION Main()
local x:=""
local dllhan
**
dllhan := LoadLib32("test1.dll")
?dlla(dllhan,5,2)
freeLib32(dllhan)
**
dllhan := LoadLib32("test2.dll")
?dlla(dllhan,5,2)
freeLib32(dllhan)
**
RETURN nil

************************************************** test dll
function dlla(dllhan,xx,yy)
local xdata
local zzz
      zzz:=getprocaddress(dllhan,"DoAdd",.t.,4,4,4)
      xdata=calldll(zzz,xx,yy)
return (xdata)

********************************* test1.c
#include <windows.h>

#pragma argsused
BOOL WINAPI DllEntryPoint(HINSTANCE h, DWORD d, LPVOID p)
  {
  return TRUE;
  }

int __declspec(dllexport) WINAPI DoAdd(int i, int j)
  {
  return i + j;
  }

int __declspec(dllexport) WINAPI DoSub(int i, int j)
  {
  return i - j;
  }

REM *********************************************************** ccdll.bat
bcc32 -WDR -Ic:\bcc55\include;c:\harbour\include -Lc:\bcc55\lib test1.c

************************************************* test2.prg
FUNCTION DoString( cdata )
local xdata:="test a string "+cdata

RETURN xdata

FUNCTION DoAdd(v1,v2 )
local xdata:=v1+v2

RETURN xdata

FUNCTION DoSub(v1,v2 )
local xdata:=v1-v2

RETURN xdata

REM **************************************************** chbdll.bat
REM Self contained Harbour DLL, original idea and research Antonio Linares

@ECHO OFF
CLS

IF A%1 == A GOTO :SINTAX
IF NOT EXIST %1.prg GOTO :NOEXIST

ECHO Compiling...

SET hdir=c:\harbour
SET bcdir=c:\bcc55\bin

%bcdir%\bcc32 -c -D__EXPORT__ -I%hdir%\include;\harbourdev\a\include;\bcc55\include -L%bcdir%\..\lib maindll.c
%hdir%\bin\harbour %1 /n /i%hdir%\include /w /p %2 %3 > clip.log

@type clip.log
IF ERRORLEVEL 1 PAUSE
IF ERRORLEVEL 1 GOTO EXIT

ECHO -O2 -I%hdir%\include;\harbour\include;\bcc55\include %1.c > b32.bc

%bcdir%\bcc32 -WDR -M -c @b32.bc

:ENDCOMPILE

IF EXIST %1.rc %bcdir%\brc32 -r %1

ECHO c0w32.obj + > b32.bc
ECHO %1.obj, + >> b32.bc
ECHO %1.dll, + >> b32.bc
ECHO %1.map, + >> b32.bc
ECHO %hdir%\lib\hbrtl.lib + >> b32.bc
ECHO %hdir%\lib\hbvm.lib + >> b32.bc
ECHO %hdir%\lib\gtwin.lib + >> b32.bc
ECHO %hdir%\lib\hblang.lib + >> b32.bc
ECHO %hdir%\lib\hbmacro.lib + >> b32.bc
ECHO %hdir%\lib\hbrdd.lib + >> b32.bc
ECHO %hdir%\lib\rddntx.lib + >> b32.bc
ECHO %hdir%\lib\rddcdx.lib + >> b32.bc
ECHO %hdir%\lib\hbdebug.lib + >> b32.bc
ECHO %hdir%\lib\hbcommon.lib + >> b32.bc
ECHO %hdir%\lib\hbpp.lib + >> b32.bc
ECHO %hdir%\lib\hbmzip.lib + >> b32.bc
ECHO %hdir%\lib\hbsix.lib + >> b32.bc
ECHO %hdir%\lib\rddfpt.lib + >> b32.bc
ECHO %bcdir%\lib\cw32.lib + >> b32.bc
ECHO %bcdir%\lib\import32.lib + >> b32.bc
ECHO %bcdir%\lib\psdk\odbc32.lib + >> b32.bc
ECHO %bcdir%\lib\psdk\rasapi32.lib, >> b32.bc


IF EXIST %1.res ECHO %1.res >> b32.bc
%bcdir%\ilink32 -Tpd -aa -s -L%bcdir%\..\lib -L%bcdir%\..\lib\PSDK @b32.bc

REM delete temporary files
@del %1.c
@del %1.il?

IF ERRORLEVEL 1 GOTO LINKERROR
ECHO * Self contained DLL successfully built
GOTO EXIT
ECHO

:LINKERROR
REM if exist meminfo.txt notepad meminfo.txt
REM PAUSE * Linking errors *
GOTO EXIT

:SINTAX
ECHO SYNTAX: Build [Program] {-- No especifiques la extensi«n PRG
ECHO {-- Don't specify .PRG extension
GOTO EXIT

:NOEXIST
ECHO The specified PRG %1 does not exist

:EXIT

******************************************************************************************
REM Self contained Harbour DLL, original idea and research Antonio Linares
@ECHO OFF
CLS
IF A%1 == A GOTO :SINTAX
IF NOT EXIST %1.prg GOTO :NOEXIST
ECHO Compiling...
SET hdir=c:\harbour
SET bcdir=c:\bcc55
%hdir%\bin\harbour -n -w errorsys /i%hdir%\include
%bcdir%\bin\bcc32 -c -D__EXPORT__ -I%hdir%\include;%bcdir%\include errorsys.c
%hdir%\bin\harbour %1 /n /i%hdir%\include /w /p %2 %3 > clip.log
@type clip.log
IF ERRORLEVEL 1 PAUSE
IF ERRORLEVEL 1 GOTO EXIT
ECHO -O2 -I%hdir%\include;\harbour\include;%bcdir%\include;%bcdir%\lib %1.c > b32.bc
%bcdir%\bin\bcc32 -WDR -M -c @b32.bc
:ENDCOMPILE
IF EXIST %1.rc %bcdir%\bin\brc32 -r %1
ECHO %bcdir%\lib\c0w32.obj + > b32.bc
echo %1.obj+errorsys.obj+maindll.obj, + >> b32.bc
ECHO %1.dll, + >> b32.bc
ECHO %1.map, + >> b32.bc
ECHO %hdir%\lib\hbrtl.lib + >> b32.bc
ECHO %hdir%\lib\hbvm.lib + >> b32.bc
ECHO %hdir%\lib\gtwin.lib + >> b32.bc
ECHO %hdir%\lib\hblang.lib + >> b32.bc
ECHO %hdir%\lib\hbmacro.lib + >> b32.bc
ECHO %hdir%\lib\hbrdd.lib + >> b32.bc
ECHO %hdir%\lib\rddntx.lib + >> b32.bc
ECHO %hdir%\lib\rddcdx.lib + >> b32.bc
ECHO %hdir%\lib\hbdebug.lib + >> b32.bc
ECHO %hdir%\lib\hbcommon.lib + >> b32.bc
ECHO %hdir%\lib\hbpp.lib + >> b32.bc
ECHO %hdir%\lib\hbmzip.lib + >> b32.bc
ECHO %hdir%\lib\hbsix.lib + >> b32.bc
ECHO %hdir%\lib\rddfpt.lib + >> b32.bc
ECHO %bcdir%\lib\cw32.lib + >> b32.bc
ECHO %bcdir%\lib\import32.lib + >> b32.bc
ECHO %bcdir%\lib\psdk\odbc32.lib + >> b32.bc
ECHO %bcdir%\lib\uuid.lib + >> b32.bc
ECHO %bcdir%\lib\psdk\rasapi32.lib, >> b32.bc
IF EXIST %1.res ECHO %1.res >> b32.bc
%bcdir%\bin\ilink32 -Tpd -aa -s -L%bcdir%\lib -L%bcdir%\lib\PSDK @b32.bc
REM delete temporary files
@del %1.c
@del %1.il?
IF ERRORLEVEL 1 GOTO LINKERROR
ECHO * Self contained DLL successfully built
GOTO EXIT
ECHO
:LINKERROR
REM if exist meminfo.txt notepad meminfo.txt
REM PAUSE * Linking errors *
GOTO EXIT
:SINTAX
ECHO SYNTAX: Build [Program] {-- No especifiques la extensi«n PRG
ECHO {-- Don't specify .PRG extension
GOTO EXIT
:NOEXIST
ECHO The specified PRG %1 does not exist
:EXIT

********************************************************************************

/*
 * $Id: errorsys.prg,v 1.2 2002/02/21 23:08:28 jgiraldo Exp $
 */

/*
 * Harbour Project source code:
 * The default error handler
 *
 * Copyright 1999 Antonio Linares <alinares@fivetech.com>
 * www - <!-- m --><a class="postlink" href="http://www.harbour-project.org">http://www.harbour-project.org</a><!-- m -->
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2, or (at your option)
 * any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this software; see the file COPYING.  If not, write to
 * the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
 * Boston, MA 02111-1307 USA (or visit the web site <!-- m --><a class="postlink" href="http://www.gnu.org/">http://www.gnu.org/</a><!-- m -->).
 *
 * As a special exception, the Harbour Project gives permission for
 * additional uses of the text contained in its release of Harbour.
 *
 * The exception is that, if you link the Harbour libraries with other
 * files to produce an executable, this does not by itself cause the
 * resulting executable to be covered by the GNU General Public License.
 * Your use of that executable is in no way restricted on account of
 * linking the Harbour library code into it.
 *
 * This exception does not however invalidate any other reasons why
 * the executable file might be covered by the GNU General Public License.
 *
 * This exception applies only to the code released by the Harbour
 * Project under the name Harbour.  If you copy code from other
 * Harbour Project or Free Software Foundation releases into a copy of
 * Harbour, as the General Public License permits, the exception does
 * not apply to the code that you add in this way.  To avoid misleading
 * anyone as to the status of such modified files, you must delete
 * this exception notice from them.
 *
 * If you write modifications of your own for Harbour, it is your choice
 * whether to permit this exception to apply to your modifications.
 * If you do not wish that, delete this exception notice.
 *
 */

#include "common.ch"
#include "error.ch"

PROCEDURE ErrorSys

   ErrorBlock( { | oError | DefError( oError ) } )

   RETURN

STATIC FUNCTION DefError( oError )
   LOCAL cMessage
   LOCAL cDOSError

   LOCAL aOptions
   LOCAL nChoice

   LOCAL n

   // By default, division by zero results in zero
   IF oError:genCode == EG_ZERODIV
      RETURN 0
   ENDIF

   // Set NetErr() of there was a database open error
   IF oError:genCode == EG_OPEN .AND. ;
      oError:osCode == 32 .AND. ;
      oError:canDefault
      NetErr( .T. )
      RETURN .F.
   ENDIF

   // Set NetErr() if there was a lock error on dbAppend()
   IF oError:genCode == EG_APPENDLOCK .AND. ;
      oError:canDefault
      NetErr( .T. )
      RETURN .F.
   ENDIF

   cMessage := ErrorMessage( oError )+Chr(13)
   IF ! Empty( oError:osCode )
      cDOSError := "(DOS Error " + LTrim( Str( oError:osCode ) ) + ")"
   ENDIF

   /* RETRY OPTIONS NOT AVAILABLE RIGHT NOW
      COMMENTED OUT ONLY FOR DELPHI INTEGRATION

   // Build buttons

   aOptions := {}

// AAdd( aOptions, "Break" )
   AAdd( aOptions, "Quit" )

   IF oError:canRetry
      AAdd( aOptions, "Retry" )
   ENDIF

   IF oError:canDefault
      AAdd( aOptions, "Default" )
   ENDIF

   // Show alert box

   nChoice := 0
   WHILE nChoice == 0

      IF Empty( oError:osCode )

         nChoice := Alert( cMessage, aOptions )
      ELSE
         nChoice := Alert( cMessage + ";" + cDOSError, aOptions)
      ENDIF

   ENDDO

   IF ! Empty( nChoice )
      DO CASE
      CASE aOptions[ nChoice ] == "Break"
         Break( oError )
      CASE aOptions[ nChoice ] == "Retry"
         RETURN .T.
      CASE aOptions[ nChoice ] == "Default"
         RETURN .F.
      ENDCASE
   ENDIF

   */

   // "Quit" selected

   IF ! Empty( oError:osCode )
      cMessage += " " + cDOSError+Chr(13)
   ENDIF

   n := 2
   WHILE ! Empty( ProcName( n ) )
      /* CHANGED */
      cMessage += "Called from " + ProcName( n ) + ;
               "(" + AllTrim( Str( ProcLine( n ) ) ) + ")"+Chr(13)

      // QUESTION: from a DLL point of view, there is not main procedure,
      //           instead of that, something that is not a valid string is
      //           given, causing this errorsys routine to be re-entrant.
      //           This next line is a temporal workaround to this problem,
      //           and a specific code to this Harbour to Delphi integration.
      If Upper(ProcName(n)) = 'MACROCALL'
         Exit
      EndIf
      n++
   ENDDO

   memowrit("error.log",cmessage )

***   D('QUIT')  // NOTE: A QUIT in a DLL is something not very smart, better to
   //  QUIT   //       let Delphi to end properly.

   RETURN .F.

// [vszakats]

STATIC FUNCTION ErrorMessage( oError )
   LOCAL cMessage

   // start error message
   cMessage := iif( oError:severity > ES_WARNING, "Error", "Warning" ) + " "

   // add subsystem name if available
   IF ISCHARACTER( oError:subsystem )
      cMessage += oError:subsystem()
   ELSE
      cMessage += "???"
   ENDIF

   // add subsystem's error code if available
   IF ISNUMBER( oError:subCode )
      cMessage += "/" + LTrim( Str( oError:subCode ) )
   ELSE
      cMessage += "/???"
   ENDIF

   // add error description if available
   IF ISCHARACTER( oError:description )
      cMessage += "  " + oError:description
   ENDIF

   // add either filename or operation
   DO CASE
   CASE !Empty( oError:filename )
      cMessage += ": " + oError:filename
   CASE !Empty( oError:operation )
      cMessage += ": " + oError:operation
   ENDCASE

   RETURN cMessage


#include "FiveWin.ch"
FUNCTION Main()
local x:=""
local dllhan
**
dllhan := LoadLib32("test2.dll")
?dlla(dllhan,5,2)
freeLib32(dllhan)
**
RETURN nil
**
function dlla(dllhan,xx,yy)
local xdata
local zzz
zzz:=getprocaddress(dllhan,"DoAdd",.t.,4,4,4)
xdata=calldll(zzz,xx,yy)
return (xdata)

#include "FiveWin.ch"

function Main()

   MsgInfo( DoSum( 2, 3 ) )

return nil

#pragma BEGINDUMP

#include <hbapi.h>

HB_FUNC( DOSUM )
{
   hb_retnl( hb_parnl( 1 ) + hb_parnl( 2 ) );
}

#pragma ENDDUMP

function Main()

   MsgInfo( Test() )

return nil

function Another( cValue )

   MsgInfo( cValue )

return "returned from high level"

#pragma BEGINDUMP

#include <hbapi.h>
#include <hbvm.h>

HB_FUNC( TEST )
{
   // We build the virtual machine stack frame

   hb_vmPushSymbol( hb_dynsymGetSymbol( "ANOTHER" ) ); // we push the symbol of the function to call
   hb_vmPushNil(); // we push nil for a function, a codeblock for Eval, an object for a method
   hb_vmPushString( "High level access from low level", strlen( "High level access from low level" ) );
   hb_vmFunction( 1 ); // 1 --> number of supplied parameters
   
   // the returned value can be accessed using hb_stackReturnItem() --> PHB_ITEM
   // or simply calling hb_par...( -1 );
}

#pragma ENDDUMP