I want to use function LBTRSLN from ThermalServiceLibrary.dll,

def function

int LBTRSLN(
tLBTRSLN_PARAMS * aLBTRSLN_ParamsPtr
);

and

aLBTRSLN_ParamsPtr
address stucture tLBTRSLN_PARAMS

tLBTRSLN_PARAMS

typedef struct
{
BYTE Pi;
BYTE Pr;
char * Name;
tEXTERNAL_NUMERIC Quantity;
char Vat;
tEXTERNAL_NUMERIC Price;
tEXTERNAL_NUMERIC Gross;
tEXTERNAL_NUMERIC Discount;
} tLBTRSLN_PARAMS;

how may I relay parameters to this functions

best regards
kajot

Kajot,

You may build a C function that receives an array with all the structure values and then from C you build the structure from the array and call the original function

From PRG you do:

You may need to use a define or a header file for tEXTERNAL_NUMERIC as that is not a standard Windows type. I have assumed that it is equivalent to a 32 bits number.

thanks for it

and one question yet

how define in
DLL32 Function LBTRSLN( ??? ) As INT PASCAL LIB "ThermalStructureLibrary.dll"

best redards
kajot

Kajot,

In this case you should not use the command DLL FUNCTION ...

Instead of it, create an import library from the DLL and link it to your EXE:
implib.exe ThermalStructureLibrary.lib ThermalStructureLibrary.dll

I created ThermalServiceLibrary.Lib / by implib.exe/
I go during linking error

Type: C >>>xhb.exe -o"t.c" -m -n -p -q -gc0 -I"D:\xHB.112\include" -I"D:\xHB.112\include\w32" "t.prg"<<<

xHarbour Compiler build 1.2.1 (SimpLex) (Rev. 6633)
Copyright 1999-2009, http://www.xharbour.org http://www.harbour-project.org/
Generating object output to 't.obj'...
t.prg(20): error: Undeclared identifier 'tLBTRSLN_PARAMS'.

t.prg(20): error: Syntax error; found 'aLBTRSLN_Params' expecting ';'.

t.prg(20): error: Undeclared identifier 'aLBTRSLN_Params'.

t.prg(21): error: Left operand of . has incompatible type 'int'.

t.prg(22): error: Left operand of . has incompatible type 'int'.

t.prg(23): error: Left operand of . has incompatible type 'int'.

t.prg(23): warning: Conversion from 'char *' to 'int' is undefined.

t.prg(24): error: Left operand of . has incompatible type 'int'.

t.prg(25): error: Left operand of . has incompatible type 'int'.

t.prg(26): error: Left operand of . has incompatible type 'int'.

t.prg(27): error: Left operand of . has incompatible type 'int'.

t.prg(28): error: Left operand of . has incompatible type 'int'.

t.prg(29): warning: Missing prototype for 'LBTRSLN'.

Type: C >>>Couldn't build: t.obj<<<
Type: C >>>TMAKEOBJECT<<<
Type: C >>>TMAKEOBJECT:REFRESH<<<
Type: N >>> 1423<<<

my source:

include "wintypes.ch"

Include "cstruct.ch"

include "hbdll.ch"

---

procedure t

setmode(25,80)
cls
LBTRSLN({ 1, 1, 1, "Mleko", "2", "A", "10.5", "21", "0", ""})

return

pragma BEGINDUMP

HB_FUNC( LBTRSLN )
{
tLBTRSLN_PARAMS aLBTRSLN_Params;
aLBTRSLN_Params.Pi = hb_parnl( 1, 1 );
aLBTRSLN_Params.Pr = hb_parnl( 1, 2 );
aLBTRSLN_Params.Name = hb_parc( 1, 3 );
aLBTRSLN_Params.Quantity = hb_parnl( 1, 4 );
aLBTRSLN_Params.Vat = hb_parnl( 1, 5 );
aLBTRSLN_Params.Price = hb_parnl( 1, 6 );
aLBTRSLN_Params.Gross = hb_parnl( 1, 7 );
aLBTRSLN_Params.Discount = hb_parnl( 1, 8 );
hb_retnl( LBTRSLN( &aLBTRSLN_Params ) );
}

pragma ENDDUMP

best regards
kajot

Kajot,

Include this after #pragma BEGINDUMP

define BYTE unsigned char

define tEXTERNAL_NUMERIC unsigned long

typedef struct
{
BYTE Pi;
BYTE Pr;
char * Name;
tEXTERNAL_NUMERIC Quantity;
char Vat;
tEXTERNAL_NUMERIC Price;
tEXTERNAL_NUMERIC Gross;
tEXTERNAL_NUMERIC Discount;
} tLBTRSLN_PARAMS;

sorry yet one error

Type: C >>>xhb.exe -o"t.c" -m -n -p -q -gc0 -I"D:\xHB.112\include" -I"D:\xHB.112\include\w32" "t.prg"<<<

xHarbour Compiler build 1.2.1 (SimpLex) (Rev. 6633)
Copyright 1999-2009, http://www.xharbour.org http://www.harbour-project.org/
Generating object output to 't.obj'...
t.prg(36): warning: Missing prototype for 'LBTRSLN'.

Type: C >>>xlink.exe -NOEXPOBJ -MAP -FORCE:MULTIPLE -NOIMPLIB -subsystem:console -LIBPATH:"D:\xHB.112\lib" -LIBPATH:"D:\xHB.112\c_lib" -LIBPATH:"D:\xHB.112\c_lib\win" "t.obj" "cdll.obj" "R:\lib\WinApi.lib" "R:\lib\ThermalServiceLibrary.lib" "xhb.lib" "dbf.lib" "nsx.lib" "ntx.lib" "cdx.lib" "rmdbfcdx.lib" "ct3comm.lib" crt.lib kernel32.lib user32.lib winspool.lib ole32.lib oleaut32.lib odbc32.lib odbccp32.lib uuid.lib wsock32.lib ws2_32.lib wininet.lib advapi32.lib shlwapi.lib msimg32.lib mpr.lib -out:"t.exe"<<<

Creating object: t.EXP

Creating library: t.LIB

xLINK: error: Unresolved external symbol '_LBTRSLN referenced from (t.obj)'.

xLINK: fatal error: 1 unresolved external(s).

Type: C >>>Couldn't build: t.exe<<<
Type: C >>>TMAKEPROJECT<<<
Type: C >>>TMAKEPROJECT:REFRESH<<<
Type: N >>> 1423<<<

my source:

include "wintypes.ch"

Include "cstruct.ch"

include "hbdll.ch"

---

pragma BEGINDUMP

define BYTE unsigned char

define tEXTERNAL_NUMERIC unsigned long

typedef struct
{
BYTE Pi;
BYTE Pr;
char * Name;
tEXTERNAL_NUMERIC Quantity;
char Vat;
tEXTERNAL_NUMERIC Price;
tEXTERNAL_NUMERIC Gross;
tEXTERNAL_NUMERIC Discount;
} tLBTRSLN_PARAMS;

HB_FUNC( LBTRSLN )
{
tLBTRSLN_PARAMS aLBTRSLN_Params;
aLBTRSLN_Params.Pi = hb_parnl( 1, 1 );
aLBTRSLN_Params.Pr = hb_parnl( 1, 2 );
aLBTRSLN_Params.Name = hb_parc( 1, 3 );
aLBTRSLN_Params.Quantity = hb_parnl( 1, 4 );
aLBTRSLN_Params.Vat = hb_parnl( 1, 5 );
aLBTRSLN_Params.Price = hb_parnl( 1, 6 );
aLBTRSLN_Params.Gross = hb_parnl( 1, 7 );
aLBTRSLN_Params.Discount = hb_parnl( 1, 8 );
hb_retnl( LBTRSLN( &aLBTRSLN_Params ) );
}

pragma ENDDUMP

procedure t

setmode(25,80)
cls

// OpenPort("Com4")

// 'nagłówek
// LBTRSHDR({0, 0, "Ala ma kota", "", ""})

// '2 linie z towarami
LBTRSLN({ 1, 1, 1, "Mleko", "2", "A", "10.5", "21", "0", ""})
// LBTRSLN({ 1, 1, 1, "Chleb", "10", "A", "1.49", "14.9", "0", ""})

// 'podsumowanie
// LBTRXEND1({ 1, 1, 1, "0", "35.9", "40", "4.1", "", ""})

// ClosePort()

return

Kajot,

Please add

include <hbapi.h>

after:

pragma BEGINDUMP