如何清除指定名称的打印机驱动程序中的待打印任务

怎么清除指定名称的打印机驱动程序中的待打印任务
不用考虑已经发送到打印机缓存中任务

在网上搜索了一上,怎么也找不到,请****中的高人,指点!

------解决方案--------------------
最好是有开发商的sdk
------解决方案--------------------
呃.........我也想知道，以前试过，但是木有办法
暂时只知道拔电源
------解决方案--------------------
delphi中的winSpool提供了足够的信息，可以实现

Delphi(Pascal) code


Uses Winspool, printers;

{-- GetCurrentPrinterHandle -------------------------------------------}
{: Retrieves the handle of the current printer
@Returns an API printer handle for the current printer
@Desc Uses WinSpool.OpenPrinter to get a printer handle. The caller
  takes ownership of the handle and <b>must</b> call ClosePrinter on it
  once the handle is no longer needed. Failing to do that creates a
  serious resource leak! <P>
  Requires Printers and WinSpool in the Uses clause.
@Raises EWin32Error if the OpenPrinter call fails.
}{ Created 30.9.2000 by P. Below
-----------------------------------}
Function GetCurrentPrinterHandle: THandle;
  Const
    Defaults: TPrinterDefaults = (
      pDatatype : nil;
      pDevMode  : nil;
      DesiredAccess : PRINTER_ACCESS_USE or PRINTER_ACCESS_ADMINISTER );
  Var
    Device, Driver, Port : array[0..255] of char;
    hDeviceMode: THandle;
  Begin { GetCurrentPrinterHandle }
    Printer.GetPrinter(Device, Driver, Port, hDeviceMode);
    If not OpenPrinter(@Device, Result, @Defaults) Then
      RaiseLastWin32Error;
  End; { GetCurrentPrinterHandle }

{: Kill all pending jobs on the current printer }
Procedure PurgeJobsOnCurrentPrinter;
  Var
    hPrinter: THandle;
  Begin
    hPrinter:= GetCurrentPrinterHandle;
    try
      If not WinSpool.SetPrinter( hPrinter, 0, nil, PRINTER_CONTROL_PURGE )
      Then
        RaiseLastWin32Error;
    finally
      ClosePrinter( hPrinter );
    end;
  End; { PurgeJobsOnCurrentPrinter }

------解决方案--------------------

windows不是对所有打印机的控制都有效。。。
所以不要过于寄于API上，尽量找下相应的SDK才行

如何清除指定名称的打印机驱动程序中的待打印任务

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