Creating a LIB or DLL

[Dave Zowasky]

Antonio,

Some progress. I am able to get to entry point 1
My msginfo from test1 in the dll is displayed, however there is no data being displayed in it.

Code: Select all  Expand view  RUN

************************** Test 5 Hello World 2
function test5()
   local cr:=chr(13)
   HbDLLEntry3( "TEST1", "TESTA", "testb" )
   MsgInfo( "OK! We are back to the EXE." )
return nil
 

In my maindll.c

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LONG PASCAL _export HBDLLENTRY3( char * cProcName, char * cText1, char * cText2 )
{
   PHB_ITEM pItem1 = hb_itemPutC( NULL, cText1 );
   PHB_ITEM pItem2 = hb_itemPutC( NULL, cText2 );
   MessageBox( 0, "Point 1", "1", 0 );
   hb_itemDoC( cProcName, 2, pItem1, pItem2, 0 );

   hb_itemRelease( pItem1 );
   hb_itemRelease( pItem2 );

   return 0;
}

Code in dll2test.prg

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function Test1( cMsg1, cMsg2 )

   MsgInfo( cMsg1, cMsg2 )

return nil
 

Thanks

[Antonio Linares]

Dave,

Have you declared HBDLLENTRY3() this way ?

DLL FUNCTION HBDLLENTRY3( cProc AS LPSTR, cText1 AS LPSTR, cText2 AS LPSTR ) AS LPSTR PASCAL LIB "dll2test.dll"

[Dave Zowasky]

Antonio,

I had tried it that way and must have had it wrong. I cut and paste yours and it works great

I have been on to next the step.

I am having a problem with my dll compile with this code

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HB_EXPORT char * PASCAL _export HBDLLSTRING4( char * cProcName, char cText1, char cText2 )
{
   PHB_ITEM pResult;  
   PHB_ITEM pItem1 = hb_itemPutC( NULL, cText1 );
   PHB_ITEM pItem2 = hb_itemPutC( NULL, cText2 );
   pResult = hb_itemDoC( cProcName, 2, pItem1, pItem2, 0 );
   hb_itemRelease( pItem1 );
   hb_itemRelease( pItem2 );
   return hb_itemGetC( pResult );
}

 

I get error

Code: Select all  Expand view  RUN

Error E2342 maindll.c 149: Type mismatch in parameter 'szText' (wanted 'const signed char *', got 'int') in function HBDLLSTRING4
Error E2342 maindll.c 150: Type mismatch in parameter 'szText' (wanted 'const signed char *', got 'int') in function HBDLLSTRING4
Warning W8057 maindll.c 155: Parameter 'cText1' is never used in function HBDLLSTRING4
Warning W8057 maindll.c 155: Parameter 'cText2' is never used in function HBDLLSTRING4
*** 2 errors in Compile ***

Thanks

[Antonio Linares]

Dave,

You missed two "*" here:

HB_EXPORT char * PASCAL _export HBDLLSTRING4( char * cProcName, char * cText1, char * cText2 )

[Dave Zowasky]

Antonio,

Works Great Thanks

[Dave Zowasky]

Antonio,

I started testing my dll and I have had some success with other programs. I am able to get calls to the DLL working using mg.
In my test to return data to the calling program I am getting nothing back to the mg program, however calling DLL `works very good.

I am trying to run some tests using VB and I am running into problems. Should I be able to call my DLL from VB at this point?

Thanks

[Antonio Linares]

Dave,

> Should I be able to call my DLL from VB at this point?

yes, you should be able to do it.

We don't know anything about mg, sorry.

[Dave Zowasky]

Antonio,

I have my C++ DLL calls working very well

Question is this possible?

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HB_EXPORT char * PASCAL _export HBDLLSTRING3( char * cProcName, char * cText1, char * cText2, char * cText3 )
{
   PHB_ITEM pResult;  
   PHB_ITEM pItem1 = hb_itemPutC( NULL, cText1 );
   PHB_ITEM pItem2 = hb_itemPutC( NULL, cText2 );
   PHB_ITEM pItem3 = hb_itemPutC( NULL, cText3 );

** if possible what here?
   pResult = hb_itemDoC( cProcName, 2, pItem1, pItem2, 0 );


   hb_itemRelease( pItem1 );
   hb_itemRelease( pItem2 );
   hb_itemRelease( pItem3 );
      return hb_itemGetC( pResult );
}
 

Thanks

[Antonio Linares]

Dave,

> I have my C++ DLL calls working very well

very good

pResult = hb_itemDoC( cProcName, 3, pItem1, pItem2, pItem3, 0 );

[Dave Zowasky]

Antonio,

I still have a problem when I go to three parameters.

When I call the dll from the exe, the parm data for all three fields is blank

return value is good

Code: Select all  Expand view  RUN

HB_EXPORT char * PASCAL _export HBDLLSTRING5( char * cProcName, char * cText1, char * cText2, char * cText3  )
{
   PHB_ITEM pResult;  
   PHB_ITEM pItem1 = hb_itemPutC( NULL, cText1 );
   PHB_ITEM pItem2 = hb_itemPutC( NULL, cText2 );
   PHB_ITEM pItem3 = hb_itemPutC( NULL, cText3 );
   MessageBox( 0, "Point  in hbdllstring5", "1", 0 );
   pResult = hb_itemDoC( cProcName, 3, pItem1, pItem2, pItem3, 0 );
   hb_itemRelease( pItem1 );
   hb_itemRelease( pItem2 );
   hb_itemRelease( pItem3 );
   return hb_itemGetC( pResult );
}

 

in exe

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************************** Test 7 Hello World 3
function test7()
   local cr:=chr(13)

************************** for return string from dll
   local rtnitem:="Return Value not set yet."
   local item1:="Here We are"
   local item2:="Top of Box"
   local item3:="TItem 3"
   rtnitem:=HbDLLstring5( "TEST5", Item1, Item2, Item3  )
   MsgInfo( rtnitem+cr+"OK! We are back to the EXE." )
return nil
 

in exe

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DLL FUNCTION HBDLLSTRING5( cProc AS LPSTR, cText1 AS LONG, cText2 AS LONG, cText3 AS LONG  ) AS LPSTR PASCAL LIB "dll2test.dll"

In dll

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********************************** Test 2 Hello World Back
function Test5( cMsg1, cMsg2, cMsg3 )
local cr:=chr(13)

   cMsg1:=cMsg1+"This is being added on in the DLL."
   cMsg1:=cMsg1+"     So Far so good."

   MsgInfo( cMsg1, cMsg2 )

   MsgInfo( cMsg3, "AAA" )



return (cMsg1)
 

Thanks

[Antonio Linares]

Dave,

This is wrong:

Code: Select all  Expand view  RUN

DLL FUNCTION HBDLLSTRING5( cProc AS LPSTR, cText1 AS LONG, cText2 AS LONG, cText3 AS LONG  ) AS LPSTR PASCAL LIB "dll2test.dll"
 

It has to be this way:

Code: Select all  Expand view  RUN

DLL FUNCTION HBDLLSTRING5( cProc AS LPSTR, cText1 AS LPSTR, cText2 AS LPSTR, cText3 AS LPSTR  ) AS LPSTR PASCAL LIB "dll2test.dll"
 

[Dave Zowasky]

Antonio,

Works good, I see what to clean up.

Thanks

[asimoes]

Amigos,
Con base en este ejemplo cómo pasar una variable por referencia, por ejemplo:

cMsg1: = ""
cMsg2: = ""
cMsg3: = ""

Test5(@cMsg1, @cMsg2, @cMsg3)

Hasta ahora no recibo éxito hasta llamar
disculpen mi español es el traductor de google

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hLib := hb_libLoad( "MinhaDll.dll" )
c:=""
x:=hb_DynCall( { "HBDLLSTRING5", hLib, hb_bitOr( HB_DYN_CTYPE_CHAR_PTR , HB_DYN_CALLCONV_STDCALL )  },"Test5", @c, "Top of Box", "Item 3" )
hb_libFree( hLib )
 

Code: Select all  Expand view  RUN

function Test5( cMsg1, cMsg2, cMsg3 )
local cr:=chr(13)

   cMsg1:=cMsg1+"This is being added on in the DLL."
   cMsg1:=cMsg1+"     So Far so good."
   
   cMsg2:="Outro valor"
   cMsg3:="Outro valor"
   
   MsgInfo( cMsg1, cMsg2 )

   MsgInfo( cMsg3, "AAA" )



return (cMsg1)

HB_EXPORT char * PASCAL _export HBDLLSTRING5( char * cProcName, char * cText1, char * cText2, char * cText3  )
{
   PHB_ITEM pResult;  
   PHB_ITEM pItem1 = hb_itemPutC( NULL, cText1 );
   PHB_ITEM pItem2 = hb_itemPutC( NULL, cText2 );
   PHB_ITEM pItem3 = hb_itemPutC( NULL, cText3 );
   MessageBox( 0, "Point  in hbdllstring5", "1", 0 );
   pResult = hb_itemDoC( cProcName, 3, pItem1, pItem2, pItem3, 0 );
   hb_itemRelease( pItem1 );
   hb_itemRelease( pItem2 );
   hb_itemRelease( pItem3 );
   return hb_itemGetC( pResult );
}
 

[Antonio Linares]

Please carefully review this post:

viewtopic.php?p=66183#p66183

[asimoes]

Hola Antonio,
Gracias por el servicio rápido.
Yo no podía entender cómo aplicar el ejemplo del mensaje que publiqué el problema.