求教OpenPrinter2函数

wolfly

为了获取指定打印机的句柄, 用以下语句:

Dim pd              As PRINTER_DEFAULTS
Dim PrinterHandle   As Long
Dim Result          As Long
Dim PrinterName     As String
    pd.pDataType = vbNullString
    pd.pDevMode = 0&
    pd.DesiredAccess = PRINTER_ALL_ACCESS
    PrinterName="Canno S220SP"
    Result = OpenPrinter2(PrinterName, PrinterHandle, pd)

对于本地打印机名:
PrinterName="Canno S220SP"
执行是成功的,

但是把这个打印机共享了, 在另一台机器上通过网络打印机名:
PrinterName="\\A003\Canno S220SP"
来获取PrinterHandle, 却是怎么也不行!

请教大侠, 如何用OpenPrinter2获取网络上打印机的PrinterHandle?

rajah1982

PrinterName="\\A003\Canno S220SP"

    If OpenPrinter(PrinterName, hPrinter, 0&) <> 0 Then
hPrinter就是你要的东东

Public Declare Function OpenPrinter Lib "winspool.drv" Alias "OpenPrinterA" (ByVal pPrinterName As String, phPrinter As Long, ByVal pDefault As Long) As Long

wolfly

楼上大侠误解了, OpenPrinter没问题, 我现在是用OpenPrinter2 有问题

rajah1982

楼主哥哥，OpenPrinter2这个函数是哪个库里的？

wolfly

rajah1982 弟弟:

OpenPrinter 和 OpenPrinter2 的定义如下

Private Declare Function OpenPrinter2 Lib "winspool.drv" Alias "OpenPrinterA" (ByVal pPrinterName As String, phPrinter As Long, pDefault As PRINTER_DEFAULTS) As Long
Private Declare Function ClosePrinter Lib "winspool.drv" (ByVal hPrinter As Long) As Long

wolfly

有人在吗？

goal1108

我使用 OpenPrinter 得到 的handle 用 GetPrinter打开后,在 PRINTER_INFO_2 结构中的status成员找不到"无法连接"这个错误代码状态 可是windows 2003 自己能够判断 在 [打印机和传真] 列表中 如果一个网络打印机 由于网络连不通 在[状态]一栏 会显示"无法连接" 不知道 windows怎么做到的.
我猜想 可能使用OpenPrinter2这个未公开的API,用了其中的PRINTER_OPTIONS参数 获得了一个远程的handle 因为 在msdn中对PRINTER_OPTIONS 有以下可选择项

The PRINTER_OPTION_FLAGS enumeration is used to specify the caching of a handle for a printer opened with OpenPrinter2.

typedef enum
{
  PRINTER_OPTION_NO_CACHE,
  PRINTER_OPTION_CACHE,
  PRINTER_OPTION_CLIENT_CHANGE
} PRINTER_OPTION_FLAGS;

PRINTER_OPTION_NO_CACHE
The handle is not cached. All functions applied to a handle returned by OpenPrinter2 will go to the remote computer.
PRINTER_OPTION_CACHE
The handle is cached. All functions applied to a handle returned by OpenPrinter2 will go to the local cache.
PRINTER_OPTION_CLIENT_CHANGE
The handle returned by OpenPrinter2 can be used by SetPrinter to rename the printer connection.