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| uses Winspool, Printers;
function GetCurrentPrinterHandle: THandle; var Device, Driver, Port: array[0..255] of Char; hDeviceMode: THandle; begin Printer.GetPrinter(Device, Driver, Port, hDeviceMode); if not OpenPrinter(@Device, Result, nil) then RaiseLastWin32Error; end;
procedure TForm1.Button2Click(Sender: TObject); var FFinder : cardinal; FNotifyInfo : PRINTER_NOTIFY_OPTIONS; FPrinter : THandle; FFlags : DWord; p : Pointer; begin FPrinter := GetCurrentPrinterHandle; try FCancel := false; FFinder := FindFirstPrinterChangeNotification(FPrinter, PRINTER_CHANGE_JOB, 0, nil); if FFinder = INVALID_HANDLE_VALUE then raise Exception.Create('Cannot create notification object\'); try while not FCancel do begin if WaitForSingleObject(FFinder, 50) = WAIT_OBJECT_0 then begin if FindNextPrinterChangeNotification(FFinder, FFlags, NIL, p) then begin
if (FFlags and PRINTER_CHANGE_ADD_JOB)<>0 then begin ShowMessage('A print job was sent to the printer.'); end;
FreePrinterNotifyInfo(p); end; end; Application.ProcessMessages; end; finally FindClosePrinterChangeNotification(FFinder); end; finally ClosePrinter(FPrinter); end;
end;
procedure TForm1.ButtonGetJobsClick(Sender: TObject); type TJobs = array [0..1000] of JOB_INFO_1; PJobs = ^TJobs; var hPrinter: THandle; bytesNeeded, numJobs, i: Cardinal; pJ: PJobs; begin memo1.Lines.Add(''); hPrinter := GetCurrentPrinterHandle; try EnumJobs(hPrinter, 0, 1000, 1, nil, 0, bytesNeeded,numJobs); pJ := AllocMem(bytesNeeded); if not EnumJobs(hPrinter, 0, 1000, 1, pJ, bytesNeeded, bytesNeeded, numJobs) then RaiseLastWin32Error;
if numJobs = 0 then memo1.Lines.Add('No jobs in queue') else for i := 0 to Pred(numJobs) do begin memo1.Lines.Add(Format('Printer %s, Job %s, Status (%d): %s', [SavePChar(pJ^[i].pPrinterName), SavePChar(pJ^[i].pDocument), pJ^[i].Status, SavePChar(pJ^[i].pStatus)])); if Listbox1.Items.IndexOfName(IntToStr(pJ^[i].JobId)) = -1 then begin Listbox1.Items.Add(IntToStr(pJ^[i].JobId)+'='+ IntToStr(pJ^[i].TotalPages)+ '_'+SavePChar(pJ^[i].pUserName)); end; end; finally ClosePrinter(hPrinter); end; end; |