几个打印机的API函数

韩冰

前几天写程序用到几个打印的API函数.把研究成果和大家分享

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建议大家结合MSDN看看

Private Type PRINTER_INFO_1

Flags As Long

pDescription As Long

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pName As Long

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pComment As Long

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End Type

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Private Declare Function PrinterProperties Lib "winspool.drv" (ByVal hWnd As

Long, ByVal hPrinter As Long) As Long

Private Declare Function ClosePrinter Lib "winspool.drv" (ByVal hPrinter As

Long) As Long

Private Declare Function OpenPrinter Lib "winspool.drv" Alias "OpenPrinterA"

(ByVal pPrinterName As String, phPrinter As Long, pDefault As Long) As Long

Private Declare Function GetPrinter Lib "winspool.drv" Alias "GetPrinterA" (

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ByVal hPrinter As Long, ByVal Level As Long, pPrinter As Any, ByVal cbBuf As

Long, pcbNeeded As Long) As Long

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Private Declare Function lstrcpy Lib "kernel32" Alias "lstrcpyA" _

(ByVal lpString1 As String, ByVal lpString2 As Long) As Long

Private Declare Function lstrlen Lib "kernel32" Alias "lstrlenA" (ByVal lpSt

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ring As Long) As Long

GetPrinter函数返回的数据即我们想要的数据在参数pPrinter而且是一个地址指针指向

一个PRINTER_INFO_1结构.结构的pDescription 是指向打印机描述字符串的指针.

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在VB只好用CopyMemory,lstrcpy 和 lstrlen得到这个字符串.

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下面是 例程:得到打印机的类型名

'pDeviceName是打印机名

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'pType 是返回的打印机 Description中的打印机类型.这个串里还有打印机名和驱动程序

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Private Sub GetPrint(pDeviceName, pType As String)

Dim pIn As PRINTER_INFO_1

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Dim s As String * 256

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Dim r As Long, phPrinter As Long, r1 As Long

On Error Resume Next

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r = OpenPrinter(pDeviceName & Chr(0), phPrinter, 0&)

If r = 0 Then Exit Sub

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r = GetPrinter(phPrinter, 1, 0, 0, r1)

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ReDim pPrinter(r1) As Byte

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r = GetPrinter(phPrinter, 1, pPrinter(0), r1, r1)

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If r = 0 Then Exit Sub

r = ClosePrinter(phPrinter)

CopyMemory pIn, pPrinter(0), Len(pIn)

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r1 = lstrlen(pIn.pDescription)

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r = lstrcpy(s, pIn.pDescription)

If r = 0 Then Exit Sub

pType = Left(s, r1)

r1 = InStr(1, pType, ",")

r = InStr(r1 + 1, pType, ",")

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pType = Mid(pType, r1 + 1, r - r1 - 1)

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End Sub

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PrinterProperties函数比较简单.你试试吗?