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...list print-jobs in a printer-queue?
Autor: P. Below
Homepage: http://www.teamb.com
[ Print tip ]  

Tip Rating (20):  
     


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, nilthen
    
RaiseLastWin32Error;
end;

function SavePChar(p: PChar): PChar;
const
  
error: PChar = 'Nil';
begin
  if not 
Assigned(p) then
    
Result := error
  else
    
Result := p;
end;

procedure TForm1.Button1Click(Sender: TObject);
type
  
TJobs  = array [0..1000] of JOB_INFO_1;
  PJobs = ^TJobs;
var
  
hPrinter: THandle;
  bytesNeeded, numJobs, i: Cardinal;
  pJ: PJobs;
begin
  
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;

    memo1.Clear;
    if numJobs = 0 then
      
memo1.Lines.Add('No jobs in queue')
    else
      for 
i := 0 to Pred(numJobs) do
        
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)]));
  finally
    
ClosePrinter(hPrinter);
  end;
end;


 

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