vb访问网络打印机(远程打印轻松实现：vb网络打印机)

vb访问网络打印机(远程打印轻松实现：vb网络打印机)已关闭评论

A+

摘要

引言网络打印机是一种通过局域网、互联网或者虚拟专用网络连接的打印机，与传统打印机不同的是它能够减少在打印任务中本地计算机与打印机之间的负载，提高打印效率，这恰好符合了我们在云计算时代的需求。本文将探讨如何通过VB访问网络打印机，实现远程打印。VB如何访问网络打印机VB

引言

网络打印机是一种通过局域网、互联网或者虚拟专用网络连接的打印机，与传统打印机不同的是它能够减少在打印任务中本地计算机与打印机之间的负载，提高打印效率，这恰好符合了我们在云计算时代的需求。本文将探讨如何通过VB访问网络打印机，实现远程打印。

VB如何访问网络打印机

VB6在访问网络打印机时只需要调用API函数，实现方法如下：

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


Private Declare Function ClosePrinter Lib "winspool.drv" (ByVal hPrinter As Long) As Long
Private Declare Function StartDocPrinter Lib "winspool.drv" Alias "StartDocPrinterA" (ByVal hPrinter As Long, ByVal Level As Long, pDocInfo As Any) As Long
Private Declare Function EndDocPrinter Lib "winspool.drv" (ByVal hPrinter As Long) As Long
Private Declare Function StartPagePrinter Lib "winspool.drv" (ByVal hPrinter As Long) As Long
Private Declare Function EndPagePrinter Lib "winspool.drv" (ByVal hPrinter As Long) As Long

Private Declare Function WritePrinter Lib "winspool.drv" (ByVal hPrinter As Long, pBuf As Any, ByVal cdBuf As Long, pcWritten As Long) As Long

以上API函数主要是处理打印机连接、文档、页等信息，其中OpenPrinter函数是用于打开网络打印机连接，其参数pPrinterName应该是网络打印机的名称（如“\\192.168.1.1\打印机名称”）。

VB实现远程打印机

下面的代码展示了如何从网络打印机打印文本文件：

Private Sub Command1_Click()


    Dim hPrinter As Long
    Dim hFile As Integer
    Dim buf() As Byte
    Dim nCount As Long
    Dim i As Long
    Dim sPrinterName As String
    Dim sFileText As String
    Dim sFileName As String
    sPrinterName = "\\192.168.1.1\打印机名称"
    sFileName = "C:\test.txt"
    hFile = FreeFile
    Open sFileName For Binary Access Read As hFile
    nCount = LOF(hFile)
    ReDim buf(0 To nCount - 1) As Byte
    Get hFile, , buf
    Close hFile
    OpenPrinter sPrinterName, hPrinter, 0
    If hPrinter Then
        Dim DocInfo As DOC_INFO_1
        Dim lngPrinted As Long
        DocInfo.pDocName = "测试打印"
        DocInfo.pOutputFile = vbNullString
        DocInfo.pDatatype = "RAW"
        StartDocPrinter hPrinter, 1, DocInfo
        StartPagePrinter hPrinter
        WritePrinter hPrinter, buf(0), nCount, lngPrinted
        EndPagePrinter hPrinter
        EndDocPrinter hPrinter
        ClosePrinter hPrinter
        MsgBox "打印成功!"
    Else
        MsgBox "无法连接打印机!"
    End If