送分400分：请问如何在打印预览前由程序选定自定义纸张
本帖最后由 beijingshengnu 于 2011-01-06 07:14:47 编辑 使用CommanDialog.ShowPrinter，会打开一个打印对话框，里面可以设置页面等属性。 Set DataReport3.DataSource = Adodc1.RecordsetDataReport3.Sections("section1").Controls("labdanweiming").Caption = strCompany
If prnshow Then DataReport3.Show 1 Else DataReport3.PrintReport True
If autoexit Then
Unload Me
End If
请帮我看一下，Veron_04，您所说的代码应加在何处，如何把CommanDialog.ShowPrinter 接收到的信息传给DATAREPORT3.
谢谢。 调用printer对象设置纸张规格。在公共模块里加入这个，然后调用。注意红色部分
Option Explicit
Public Enum PrinterOrientationConstants
OrientPortrait = 1
OrientLandscape = 2
End Enum
Private Type DEVMODE
dmDeviceName As String * 32
dmSpecVersion As Integer
dmDriverVersion As Integer
dmSize As Integer
dmDriverExtra As Integer
dmFields As Long
dmOrientation As Integer
dmPaperSize As Integer
dmPaperLength As Integer
dmPaperWidth As Integer
dmScale As Integer
dmCopies As Integer
dmDefaultSource As Integer
dmPrintQuality As Integer
dmColor As Integer
dmDuplex As Integer
dmYResolution As Integer
dmTTOption As Integer
dmCollate As Integer
dmFormName As String * 32
dmUnusedPadding As Integer
dmBitsPerPel As Integer
dmPelsWidth As Long
dmPelsHeight As Long
dmDisplayFlags As Long
dmDisplayFrequency As Long
End Type
Private Type PRINTER_DEFAULTS
pDataType As String
pDevMode As Long
DesiredAccess As Long
End Type
Private Type PRINTER_INFO_2
pServerName As Long
pPrinterName As Long
pShareName As Long
pPortName As Long
pDriverName As Long
pComment As Long
pLocation As Long
pDevMode As Long
pSepFile As Long
pPrintProcessor As Long
pDataType As Long
pParameters As Long
pSecurityDescriptor As Long
Attributes As Long
Priority As Long
DefaultPriority As Long
StartTime As Long
UntilTime As Long
Status As Long
cJobs As Long
AveragePPM As Long
End Type
'******************* '
' iDmpaper值 纸张 '
' 11 A5 '
' 13 B5 '
'******************* '
Private Const DM_IN_BUFFER As Long = 8
Private Const DM_OUT_BUFFER As Long = 2
Private Const DM_ORIENTATION As Long = &H1
Private Const DM_PAPERSIZE = &H2&
Private Const PRINTER_ACCESS_ADMINISTER As Long = &H4
Private Const PRINTER_ACCESS_USE As Long = &H8
Private Const STANDARD_RIGHTS_REQUIRED As Long = &HF0000
Private Const PRINTER_ALL_ACCESS = (STANDARD_RIGHTS_REQUIRED _
Or _
PRINTER_ACCESS_ADMINISTER Or PRINTER_ACCESS_USE)
Private Declare Sub CopyMemory Lib "kernel32 " Alias _
"RtlMoveMemory " _
(hpvDest As Any, hpvSource As Any, ByVal _
cbCopy As Long)
Private Declare Function OpenPrinter Lib "winspool.drv " Alias _
"OpenPrinterA " (ByVal pPrinterName As String, phPrinter As _
Long, pDefault As Any) As Long
Private Declare Function ClosePrinter Lib "winspool.drv " _
(ByVal hPrinter As Long) As Long
Private Declare Function DocumentProperties Lib "winspool.drv " _
Alias "DocumentPropertiesA " (ByVal hWnd As Long, ByVal hPrinter _
As Long, _
ByVal pDeviceName As String, pDevModeOutput As _
Any, _
pDevModeInput As Any, _
ByVal fMode As Long) As Long
Private Declare Function GetPrinter Lib "winspool.drv " _
Alias "GetPrinterA " (ByVal hPrinter As Long, ByVal level As Long, _
pPrinter As Any, ByVal cbBuf As Long, pcbNeeded As Long) As _
Long
Private Declare Function SetPrinter Lib "winspool.drv " _
Alias "SetPrinterA " (ByVal hPrinter As Long, ByVal level As Long, _
pPrinter As Any, ByVal Command As Long) As Long
'在打印或预览之前直接调用SetDefaultPrinterOrientation 打印走向常数。注意：红色注释部分用于改变纸张的大小。
Function SetDefaultPrinterOrientation(ByVal eOrientation As _
PrinterOrientationConstants, iDmpaper As Integer) As Boolean
Dim bDevMode() As Byte
Dim bPrinterInfo2() As Byte
Dim hPrinter As Long
Dim lResult As Long
Dim nSize As Long
Dim sPrnName As String
Dim dm As DEVMODE
Dim olddm As DEVMODE
Dim pd As PRINTER_DEFAULTS
Dim pi2 As PRINTER_INFO_2
' 获取默认打印机的设备名称
sPrnName = Printer.DeviceName
' 由于要调用SetPrinter，所以
' 如果是在NT下就要求PRINTER_ALL_ACCESS
pd.DesiredAccess = PRINTER_ALL_ACCESS
' 获取打印机句柄
If OpenPrinter(sPrnName, hPrinter, pd) Then
' 获取PRINTER_INFO_2结构要求的字节数
Call GetPrinter(hPrinter, 2&, 0&, 0&, nSize)
ReDim bPrinterInfo2(1 To nSize) As Byte
lResult = GetPrinter(hPrinter, 2, bPrinterInfo2(1), nSize, nSize)
Call CopyMemory(pi2, bPrinterInfo2(1), Len(pi2))
nSize = DocumentProperties(0&, hPrinter, sPrnName, 0&, 0&, 0)
ReDim bDevMode(1 To nSize)
If pi2.pDevMode Then
Call CopyMemory(bDevMode(1), ByVal pi2.pDevMode, Len(dm))
Else
Call DocumentProperties(0&, hPrinter, sPrnName, bDevMode(1), 0&, DM_OUT_BUFFER)
End If
Call CopyMemory(dm, bDevMode(1), Len(dm))
Call CopyMemory(olddm, bDevMode(1), Len(olddm))
With dm
' 设置新的走向
.dmOrientation = eOrientation
.dmFields = DM_ORIENTATION
.dmPaperSize = iDmpaper '将纸张大小设为iDmpaper，请自行更改所需大小
' .dmPaperLength = iDmpaperLength
' .dmPaperWidth = iDmpaperWidth
.dmFields = DM_PAPERSIZE '必须，否则无法设置纸张大小
End With
Call CopyMemory(bDevMode(1), dm, Len(dm))
Call DocumentProperties(0&, hPrinter, sPrnName, _
bDevMode(1), bDevMode(1), DM_IN_BUFFER Or _
DM_OUT_BUFFER)
pi2.pDevMode = VarPtr(bDevMode(1))
lResult = SetPrinter(hPrinter, 2, pi2, 0&)
Call ClosePrinter(hPrinter)
SetDefaultPrinterOrientation = True
Else
SetDefaultPrinterOrientation = False
End If
End Function
怎么到底粘贴的都是这段代码，一字不差。
请详细注解一下以下这些代码，每一句都请注释一下，各函数的各个参数请详细注解，在哪儿调用自定义纸张类型：
Call GetPrinter(hPrinter, 2&, 0&, 0&, nSize)
ReDim bPrinterInfo2(1 To nSize) As Byte
lResult = GetPrinter(hPrinter, 2, bPrinterInfo2(1), nSize, nSize)
Call CopyMemory(pi2, bPrinterInfo2(1), Len(pi2))
nSize = DocumentProperties(0&, hPrinter, sPrnName, 0&, 0&, 0)
ReDim bDevMode(1 To nSize)
If pi2.pDevMode Then
Call CopyMemory(bDevMode(1), ByVal pi2.pDevMode, Len(dm))
Else
Call DocumentProperties(0&, hPrinter, sPrnName, bDevMode(1), 0&, DM_OUT_BUFFER)
End If
Call CopyMemory(dm, bDevMode(1), Len(dm))
Call CopyMemory(olddm, bDevMode(1), Len(olddm))
With dm
' 设置新的走向
.dmOrientation = eOrientation
.dmFields = DM_ORIENTATION
.dmPaperSize = iDmpaper '将纸张大小设为iDmpaper，请自行更改所需大小
' .dmPaperLength = iDmpaperLength
' .dmPaperWidth = iDmpaperWidth
.dmFields = DM_PAPERSIZE '必须，否则无法设置纸张大小
End With
Call CopyMemory(bDevMode(1), dm, Len(dm))
Call DocumentProperties(0&, hPrinter, sPrnName, _
bDevMode(1), bDevMode(1), DM_IN_BUFFER Or _
DM_OUT_BUFFER)
pi2.pDevMode = VarPtr(bDevMode(1))
lResult = SetPrinter(hPrinter, 2, pi2, 0&)
Call ClosePrinter(hPrinter)
SetDefaultPrinterOrientation = True
Else
SetDefaultPrinterOrientation = False
End If
昨天泰山不是放过代码吗？ 参看
没有详细的注解，谁看得明白呀。大哥。
这样啊。其实里面最难的是一些API ，这个就不要注释了，还是你自己具体查一下是什么意思更好。
至于那个结构体，最好还是有人给注释一下~ 中国的程序员，在编程的时候，就好像是在操作一个有几千个控制按钮的机器，而这些个按钮还只有其中一小部分，我们知道是什么作用，更不要说了解这个机器的原理了，真是悲哀。
补充：VB , 网络编程
