Change Printer settings

[zeina]

I have the adobe printer installed into my system, in the Adobe
Acrobat profitional 8 the printer has a settings such as (view pdf
result, pdf output folder) I need to change them from my program, I
did some research over the net and I found this code, when I try it I
had an error (Abstract Error) so what I'm missing?? And is there
another way to achieve my goal??

thanks

code :

procedure TForm1.LoadPrinterInfo(APrinterName: PChar; ASourceStream:
TStream);
var
HPrinter : THandle;
InfoSize,
BytesNeeded: Cardinal;
PI2: PPrinterInfo2;
PrinterDefaults: TPrinterDefaults;
begin
with PrinterDefaults do
begin
DesiredAccess := PRINTER_ACCESS_USE;
pDatatype := nil;
pDevMode := nil;
end;
if OpenPrinter(APrinterName, HPrinter, @PrinterDefaults) then
try
SetLastError(0);
//Determine the number of bytes to allocate for the PRINTER_INFO_2
construct...
if not GetPrinter(HPrinter, 2, nil, 0, @BytesNeeded) then
begin
//Allocate memory space for the PRINTER_INFO_2 pointer
(PrinterInfo2)...
PI2 := AllocMem(BytesNeeded);
try
InfoSize := SizeOf(TPrinterInfo2);
if GetPrinter(HPrinter, 2, PI2, BytesNeeded, @BytesNeeded)
then
begin
PI2.pSecurityDescriptor := nil;
ASourceStream.ReadBuffer(PChar(PI2)[InfoSize], BytesNeeded -
InfoSize); // the error line
// Apply settings to the printer
if DocumentProperties(0, hPrinter, APrinterName,
PI2.pDevMode^,
PI2.pDevMode^, DM_IN_BUFFER or
DM_OUT_BUFFER) = IDOK then
begin
SetPrinter(HPrinter, 2, PI2, 0); // Ignore the result of
this call...
end;
end;
finally
FreeMem(PI2, BytesNeeded);
end;
end;
procedure TForm1.SetPrinterSettings(FPrinter: TPrinter);
var
FDevice: PChar;
FDriver: PChar;
FPort: PChar;
DeviceMode: THandle;
DevMode: PDeviceMode;
begin
{to get a current printer settings}
FPrinter.GetPrinter(FDevice, FDriver, FPort, DeviceMode);
{lock a printer device}
DevMode := GlobalLock(DeviceMode);

{set a paper size as A4-Transverse}
if ((DevMode^.dmFields and DM_PAPERSIZE) = DM_PAPERSIZE) then
begin
DevMode^.dmFields := DevMode^.dmFields or DM_PAPERSIZE;
DevMode^.dmPaperSize := DMPAPER_A4_TRANSVERSE;
end;

{set a paper source as Tractor bin}
if ((DevMode^.dmFields and DM_DEFAULTSOURCE) = DM_DEFAULTSOURCE)
then
begin
DevMode^.dmFields := DevMode^.dmFields or DM_DEFAULTSOURCE;
DevMode^.dmDefaultSource := DMBIN_TRACTOR;
end;

{set a Landscape orientation}
if ((DevMode^.dmFields and DM_ORIENTATION) = DM_ORIENTATION) then
begin
DevMode^.dmFields := DevMode^.dmFields or DM_ORIENTATION;
DevMode^.dmOrientation := DMORIENT_LANDSCAPE;
end;

{set a printer settings}
FPrinter.SetPrinter(FDevice, FDriver, FPort, DeviceMode);

{unlock a device}
GlobalUnlock(DeviceMode);
end;
finally
ClosePrinter(HPrinter);
end;
end;

procedure TForm1.Button3Click(Sender: TObject);
var
s:Tstream;
begin
s:= Tstream.Create;
LoadPrinterInfo(pchar('Adobe PDF'),s);
end ;