Spool - Informações de impressão!!!

Hi

There are of cource several ways, this is one of them!

declare this in your mainform´s private section
  procedure WM_SpoolerStatus(var Msg : TWMSPOOLERSTATUS); message
WM_SPOOLERSTATUS;


procedure TMainForm.WM_SPOOLERSTATUS(var Msg : TWMSPOOLERSTATUS);
begin
  msg.Result := 0;
  JobsInQueueLbl.Caption := inttostr(msg.jobsleft) + ´ on printer´;
 // ListJobsForprinter(PrinterName : String; var JobLV : TListView);
end;

depending of your needs you could use enumjobs to get even more information
about jobs
you could make a Listview with a list for jobs for a specific printer like
this.
remember to set viewstyle to vsreport and make some headers in the listview,
or else it just will not work.


procedure ListJobsForprinter(PrinterName : String; var JobLV : TListView);
type
  TJobInfo = array[0..0] of _JOB_INFO_2; // bruges til typecasting

var
  p : pointer;
  psize : dword;
  ji2 : _JOB_INFO_2;
  hGlobal : cardinal;
  level: DWORD;
  dwNeeded, dwReturned : DWORD;
  bFlag : BOOLEAN;
  i : dword;
  ListItem : TListItem;
  hPrinter : THandle;
  pd : _PRINTER_DEFAULTS;
  pPrinterName : Pchar;

begin
{$R-} // range checking udkoblet
  try
    p := nil;
    level := 2;
    bFlag := true;
    JobLV.Items.Clear; // slet tidligere items fra liste
    GetMem(pPrinterName,length(PrinterName)+1);
    StrPCopy(pPrinterName,PrinterName);
    // find printer handle og åben printer
    zeromemory(@pd,sizeof(pd));
    pd.DesiredAccess := PRINTER_ALL_ACCESS;
    bFlag := OpenPrinter(pPrinterName, hPrinter, @pd);
    if ((not bFlag) or (hPrinter = null)) then exit;

    // først finder vi størrelsen på bufferen
    dwneeded := 0;
    dwreturned := 0;
    bFlag := EnumJobs(hPrinter, 0, $FFFFFFFF, level, nil, 0, dwNeeded,
dwReturned);
    if (dwNeeded = 0) then exit; // dwneeded = 0 ~ måske ingen jobs fundet

    getmem(p,dwneeded);
    if (p = nil) then exit;

    // her henter jeg så de ægte data
    bFlag := EnumJobs(hPrinter, 0, $FFFFFFFF, level, p, dwNeeded, dwNeeded,
dwReturned);
    if (not bFlag) then exit;

    // Loop igennem alle jobs og hent data.
    with JobLV do
    for i := 0 to dwReturned-1 do
    begin
       Ji2 := TJobInfo(p^)[i];
       ListItem := Items.add;
       ListItem.Caption := inttostr(Ji2.JobID);
       ListItem.subitems.add(strpas(Ji2.pDocument));
       ListItem.subitems.add(strpas(Ji2.pUserName));
       if ji2.pStatus <> nil then ListItem.subitems.add(strpas(Ji2.pStatus))
       else
       case Ji2.Status of
          JOB_STATUS_PAUSED : ListItem.subitems.add(strpas(´PAUSED´));
          JOB_STATUS_ERROR : ListItem.subitems.add(strpas(´ERROR´));
          JOB_STATUS_DELETING : ListItem.subitems.add(strpas(´DELETING´));
          JOB_STATUS_SPOOLING : ListItem.subitems.add(strpas(´SPOOLING´));
          JOB_STATUS_PRINTING : ListItem.subitems.add(strpas(´PRINTING´));
          JOB_STATUS_OFFLINE : ListItem.subitems.add(strpas(´OFFLINE´));
          JOB_STATUS_PAPEROUT : ListItem.subitems.add(strpas(´PAPEROUT´));
          JOB_STATUS_PRINTED : ListItem.subitems.add(strpas(´PRINTED´));
       end;
    end;
  finally
    if (p <> nil) then freemem(p,dwneeded);
    if (pPrinterName <> nil) then freeMem(pPrinterName);
    if (hPrinter <> null) then closeprinter(hPrinter);
    if (not bFlag) then GetLastSystemError;
    {$R+} // range checking indkoblet
  end;
end;

Henrik