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function PE_DeletePrinterNow(pPrinterName: PChar):BOOL;
var hPrinter  : Cardinal; PrinterDef: PRINTER_DEFAULTS;
begin
 Result := FALSE;
 FillChar(PrinterDef, sizeof(PrinterDef), #0);

 PrinterDef.DesiredAccess := PRINTER_ALL_ACCESS;
   if OpenPrinter(pPrinterName, hPrinter, @PrinterDef) then
     begin
    if DeletePrinter(hPrinter) then Result := TRUE;

       ClosePrinter(hPrinter);
     end;
       end;
procedure TForm1.Button1Click(Sender: TObject);
begin
  PE_DeletePrinterNow(pchar('MyPrinter'));
end;