'改变打印机纸张方向的模块 'Constants used in the DevMode structure Private Const CCHDEVICENAME = 32 Private Const CCHFORMNAME = 32'Constants for NT security Private Const STANDARD_RIGHTS_REQUIRED = &HF0000 Private Const PRINTER_ACCESS_ADMINISTER = &H4 Private Const PRINTER_ACCESS_USE = &H8 Private Const PRINTER_ALL_ACCESS = (STANDARD_RIGHTS_REQUIRED Or PRINTER_ACCESS_ADMINISTER Or PRINTER_ACCESS_USE)'Constants used to make changes to the values contained in the DevMode Private Const DM_MODIFY = 8 Private Const DM_IN_BUFFER = DM_MODIFY Private Const DM_COPY = 2 Private Const DM_OUT_BUFFER = DM_COPY Private Const DM_DUPLEX = &H1000& Private Const DMDUP_SIMPLEX = 1 Private Const DMDUP_VERTICAL = 2 Private Const DMDUP_HORIZONTAL = 3 Private Const DM_ORIENTATION = &H1& Private PageDirection As Integer '------USER DEFINED TYPES'The DevMode structure contains printing parameters. 'Note that this only represents the PUBLIC portion of the DevMode. ' The full DevMode also contains a variable length PRIVATE section ' which varies in length and content between printer drivers. 'NEVER use this User Defined Type directly with any API call. ' Always combine it into a FULL DevMode structure and then send the ' full DevMode to the API call. Private Type DEVMODE dmDeviceName As String * CCHDEVICENAME 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 * CCHFORMNAME dmLogPixels As Integer dmBitsPerPel As Long dmPelsWidth As Long dmPelsHeight As Long dmDisplayFlags As Long dmDisplayFrequency As Long dmICMMethod As Long ' // Windows 95 only dmICMIntent As Long ' // Windows 95 only dmMediaType As Long ' // Windows 95 only dmDitherType As Long ' // Windows 95 only dmReserved1 As Long ' // Windows 95 only dmReserved2 As Long ' // Windows 95 only End TypePrivate Type PRINTER_DEFAULTS 'Note: ' The definition of Printer_Defaults in the VB5 API viewer is incorrect. ' Below, pDevMode has been corrected to LONG. pDatatype As String pDevMode As Long DesiredAccess As Long End Type '------DECLARATIONSPrivate Declare Function OpenPrinter Lib "winspool.drv" Alias "OpenPrinterA" (ByVal pPrinterName As String, phPrinter As Long, pDefault As PRINTER_DEFAULTS) 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 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 Sub CopyMemory Lib "kernel32" Alias "RtlMoveMemory" (hpvDest As Any, hpvSource As Any, ByVal cbCopy As Long) Private Declare Function ClosePrinter Lib "winspool.drv" (ByVal hPrinter As Long) As Long'The following is an unusual declaration of DocumentProperties: ' pDevModeOutput and pDevModeInput are usually declared ByRef. They are declared ' ByVal in this program because we're using a Printer_Info_2 structure. ' The pi2 structure contains a variable of type LONG which contains the address ' of the DevMode structure (this is called a pointer). This LONG variable must ' be passed ByVal. ' Normally this function is called with a BYTE ARRAY which contains the DevMode ' structure and the Byte Array is passed ByRef. Private Declare Function DocumentProperties Lib "winspool.drv" Alias "DocumentPropertiesA" (ByVal hWnd As Long, ByVal hPrinter As Long, ByVal pDeviceName As String, ByVal pDevModeOutput As Any, ByVal pDevModeInput As Any, ByVal fMode As Long) As LongPrivate Sub SetOrientation(NewSetting As Long, chng As Integer, ByVal frm As Form) Dim PrinterHandle As Long Dim PrinterName As String Dim pd As PRINTER_DEFAULTS Dim MyDevMode As DEVMODE Dim Result As Long Dim Needed As Long Dim pFullDevMode As Long Dim pi2_buffer() As Long 'This is a block of memory for the Printer_Info_2 structure 'If you need to use the Printer_Info_2 User Defined Type, the ' definition of Printer_Info_2 in the API viewer is incorrect. ' pDevMode and pSecurityDescriptor should be defined As Long.
PrinterName = Printer.DeviceName If PrinterName = "" Then Exit Sub End If
pd.pDatatype = vbNullString pd.pDevMode = 0& 'Printer_Access_All is required for NT security pd.DesiredAccess = PRINTER_ALL_ACCESS
Result = OpenPrinter(PrinterName, PrinterHandle, pd)
'The first call to GetPrinter gets the size, in bytes, of the buffer needed. 'This value is divided by 4 since each element of pi2_buffer is a long. Result = GetPrinter(PrinterHandle, 2, ByVal 0&, 0, Needed) ReDim pi2_buffer((Needed \ 4)) Result = GetPrinter(PrinterHandle, 2, pi2_buffer(0), Needed, Needed)
'The seventh element of pi2_buffer is a Pointer to a block of memory ' which contains the full DevMode (including the PRIVATE portion). pFullDevMode = pi2_buffer(7)
'Copy the Public portion of FullDevMode into our DevMode structure Call CopyMemory(MyDevMode, ByVal pFullDevMode, Len(MyDevMode))
'Copy our DevMode structure back into FullDevMode Call CopyMemory(ByVal pFullDevMode, MyDevMode, Len(MyDevMode))
'Copy our changes to "the PUBLIC portion of the DevMode" into "the PRIVATE portion of the DevMode" Result = DocumentProperties(frm.hWnd, PrinterHandle, PrinterName, ByVal pFullDevMode, ByVal pFullDevMode, DM_IN_BUFFER Or DM_OUT_BUFFER)
'Update the printer's default properties (to verify, go to the Printer folder ' and check the properties for the printer) Result = SetPrinter(PrinterHandle, 2, pi2_buffer(0), 0&)
Call ClosePrinter(PrinterHandle)
'Note: Once "Set Printer = " is executed, anywhere in the code, after that point ' changes made with SetPrinter will ONLY affect the system-wide printer -- ' -- the changes will NOT affect the VB printer object. ' Therefore, it may be necessary to reset the printer object's parameters to ' those chosen in the devmode. Dim p As Printer For Each p In Printers If p.DeviceName = PrinterName Then Set Printer = p Exit For End If Next p Printer.Duplex = MyDevMode.dmDuplex End SubPublic Sub ChngPrinterOrientationLandscape(ByVal frm As Form) PageDirection = 2 Call SetOrientation(DMDUP_SIMPLEX, PageDirection, frm) End SubPublic Sub ResetPrinterOrientation(ByVal frm As Form)
If PageDirection = 1 Then PageDirection = 2 Else PageDirection = 1 End If Call SetOrientation(DMDUP_SIMPLEX, PageDirection, frm) End SubPublic Sub ChngPrinterOrientationPortrait(ByVal frm As Form) PageDirection = 1 Call SetOrientation(DMDUP_SIMPLEX, PageDirection, frm) End Sub
Option Explicit '*************************************************************** '设置默认打印方向功能模块 Programming:ztchen 2002.5 '用于设置默认打印机的打印方向 '*************************************************************** '可使用的枚举参数，代表打印方向 Public Enum PrinterOrientationConstants OrientPortrait = 1 '纵向 OrientLandscape = 2 '横向 End Enum'打印机设备设置的信息 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 '该结构的dmFields成员的定义值之一 '用于与成员对应的属性的初始设置 Private Const DM_ORIENTATION = &H1 '打印方向'打印机的默认信息 Private Type PRINTER_DEFAULTS pDataType As String pDevMode As Long DesiredAccess As Long End Type '该结构的DesiredAccess成员定义 '用于设置打印机的可访问权限 Private Const PRINTER_ACCESS_ADMINISTER = &H4 '管理员级访问权限 Private Const PRINTER_ACCESS_USE = &H8 '普通用户级访问权限 Private Const STANDARD_RIGHTS_REQUIRED = &HF0000 '标准访问需要 Private Const PRINTER_ALL_ACCESS = (STANDARD_RIGHTS_REQUIRED Or _ PRINTER_ACCESS_ADMINISTER Or PRINTER_ACCESS_USE) '所有访问权限'打印机的详细信息 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'内存拷贝 Private Declare Sub CopyMemory Lib "kernel32" Alias "RtlMoveMemory" _ (hpvDest As Any, hpvSource As Any, ByVal cbCopy As Long)'打开打印机以操作 Private Declare Function OpenPrinter Lib "winspool.drv" Alias _ "OpenPrinterA" (ByVal pPrinterName As String, phPrinter As _ Long, pDefault As Any) As Long
'返回打印机信息 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'设置打印机设置数据及控制打印机操作状态 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'关闭打印机 Private Declare Function ClosePrinter Lib "winspool.drv" _ (ByVal hPrinter As Long) As Long'返回或修改打印机初始信息和显示一个打印机设置对话框 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
'用于指定该函数操作的方式 Private Const DM_IN_BUFFER = 8 '进行输入操作 Private Const DM_OUT_BUFFER = 2 '进行输出操作Public Const ERR_NOPRINTER = "尚未安装打印机。如需安装打印机，请指向Windows“开始”菜单的“设置”，单击“打印机”，然后双击“添加打印机”。按照向导中的说明进行操作即可。" '设置默认打印机的打印方向 'mp_Orientation：指定打印方向，默认为纵向 '成功返回True，不成功返回False Public Function SetDefaultPrinterOrientation(Optional ByVal mp_Orientation As PrinterOrientationConstants = 1) As Boolean Dim bytDevMode() As Byte '开辟内存以保存打印机设置信息 ' Dim lngOrgOrient As Long '保存原先打印机设置的打印方向 Dim bytPrinterInfo2() As Byte '开辟内存以保存打印机详细设置 Dim hPrinter As Long '打印机的句柄 Dim lResult As Long '检测返回结果 Dim nSize As Long '缓冲区大小 Dim strPrnName As String '打印设备名 Dim dm As DEVMODE '打印机设置信息 Dim pd As PRINTER_DEFAULTS '默认打印机信息 Dim pi2 As PRINTER_INFO_2 '打印机详细信息 '获取默认打印机的设备名 On Error GoTo Err_Hld strPrnName = Printer.DeviceName '设置访问打印机所有权限以在NT下能进行访问 pd.DesiredAccess = PRINTER_ALL_ACCESS '打开打印机并获取一个打印机句柄 If OpenPrinter(strPrnName, hPrinter, pd) Then '实验并获取当前打印机所需要的缓冲区大小 GetPrinter hPrinter, 2&, 0&, 0&, nSize '根据所获得的缓冲区大小重新分配需要存放打印机详细设置的内存大小 ReDim bytPrinterInfo2(nSize) As Byte '返回打印机详细信息到所开辟的内存中 lResult = GetPrinter(hPrinter, 2, bytPrinterInfo2(0), _ nSize, nSize) '执行失败则退出 If lResult = 0 Then SetDefaultPrinterOrientation = False ClosePrinter hPrinter Exit Function End If '拷贝打印机详细信息的内容到打印机详细信息结构体 CopyMemory pi2, bytPrinterInfo2(0), Len(pi2) '获取打印机设置信息的缓冲区大小 nSize = DocumentProperties(0, hPrinter, strPrnName, 0, 0, 0) '根据获得的打印机设置信息缓冲区大小分配相应的内存 ReDim bytDevMode(nSize)
If pi2.pDevMode Then '如果打印机详细信息结构中的pDevMode成员， '即打印机设置信息不为空则将其内容拷贝到所开辟的存放打印机设置信息的内存中 '为了操作安全性，拷贝时一定要在pi2.pDevMode上加上ByVal的限制，因为这是个不允许随意改变的指针 CopayMemory bytDevMode(0), ByVal pi2.pDevMode, Len(dm) Else '如果为空则使用DocumentProperties函数直接输出打印机设置信息到所开辟的内存中 DocumentProperties 0&, hPrinter, strPrnName, bytDevMode(0), 0&, DM_OUT_BUFFER End If '拷贝打印机设置信息内容到打印机设置信息结构体 CopyMemory dm, bytDevMode(0), Len(dm) With dm '这里进行新方向的设置 .dmOrientation = mp_Orientation .dmFields = DM_ORIENTATION End With '将新设置好的打印机设置信息拷贝回打印机设置信息内存 CopyMemory bytDevMode(0), dm, Len(dm)
'用新设置的打印机详细信息对打印机进行设置 lResult = SetPrinter(hPrinter, 2, pi2, 0&) If lResult = 0 Then SetDefaultPrinterOrientation = False ClosePrinter hPrinter Exit Function End If
'操作完后关闭打印机并返回成功 Call ClosePrinter(hPrinter) SetDefaultPrinterOrientation = True Else '打开打印机失败则返回失败 SetDefaultPrinterOrientation = False End If Exit Function Err_Hld: '没有安装打印机错误 If Err.Number = 484 Then MsgBox ERR_NOPRINTER, vbExclamation, "打印机错误" SetDefaultPrinterOrientation = False Exit Function End If End Function
'Constants used in the DevMode structure
Private Const CCHDEVICENAME = 32
Private Const CCHFORMNAME = 32'Constants for NT security
Private Const STANDARD_RIGHTS_REQUIRED = &HF0000
Private Const PRINTER_ACCESS_ADMINISTER = &H4
Private Const PRINTER_ACCESS_USE = &H8
Private Const PRINTER_ALL_ACCESS = (STANDARD_RIGHTS_REQUIRED Or PRINTER_ACCESS_ADMINISTER Or PRINTER_ACCESS_USE)'Constants used to make changes to the values contained in the DevMode
Private Const DM_MODIFY = 8
Private Const DM_IN_BUFFER = DM_MODIFY
Private Const DM_COPY = 2
Private Const DM_OUT_BUFFER = DM_COPY
Private Const DM_DUPLEX = &H1000&
Private Const DMDUP_SIMPLEX = 1
Private Const DMDUP_VERTICAL = 2
Private Const DMDUP_HORIZONTAL = 3
Private Const DM_ORIENTATION = &H1&
Private PageDirection As Integer
'------USER DEFINED TYPES'The DevMode structure contains printing parameters.
'Note that this only represents the PUBLIC portion of the DevMode.
' The full DevMode also contains a variable length PRIVATE section
' which varies in length and content between printer drivers.
'NEVER use this User Defined Type directly with any API call.
' Always combine it into a FULL DevMode structure and then send the
' full DevMode to the API call.
Private Type DEVMODE
dmDeviceName As String * CCHDEVICENAME
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 * CCHFORMNAME
dmLogPixels As Integer
dmBitsPerPel As Long
dmPelsWidth As Long
dmPelsHeight As Long
dmDisplayFlags As Long
dmDisplayFrequency As Long
dmICMMethod As Long ' // Windows 95 only
dmICMIntent As Long ' // Windows 95 only
dmMediaType As Long ' // Windows 95 only
dmDitherType As Long ' // Windows 95 only
dmReserved1 As Long ' // Windows 95 only
dmReserved2 As Long ' // Windows 95 only
End TypePrivate Type PRINTER_DEFAULTS
'Note:
' The definition of Printer_Defaults in the VB5 API viewer is incorrect.
' Below, pDevMode has been corrected to LONG.
pDatatype As String
pDevMode As Long
DesiredAccess As Long
End Type
'------DECLARATIONSPrivate Declare Function OpenPrinter Lib "winspool.drv" Alias "OpenPrinterA" (ByVal pPrinterName As String, phPrinter As Long, pDefault As PRINTER_DEFAULTS) 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
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 Sub CopyMemory Lib "kernel32" Alias "RtlMoveMemory" (hpvDest As Any, hpvSource As Any, ByVal cbCopy As Long)
Private Declare Function ClosePrinter Lib "winspool.drv" (ByVal hPrinter As Long) As Long'The following is an unusual declaration of DocumentProperties:
' pDevModeOutput and pDevModeInput are usually declared ByRef. They are declared
' ByVal in this program because we're using a Printer_Info_2 structure.
' The pi2 structure contains a variable of type LONG which contains the address
' of the DevMode structure (this is called a pointer). This LONG variable must
' be passed ByVal.
' Normally this function is called with a BYTE ARRAY which contains the DevMode
' structure and the Byte Array is passed ByRef.
Private Declare Function DocumentProperties Lib "winspool.drv" Alias "DocumentPropertiesA" (ByVal hWnd As Long, ByVal hPrinter As Long, ByVal pDeviceName As String, ByVal pDevModeOutput As Any, ByVal pDevModeInput As Any, ByVal fMode As Long) As LongPrivate Sub SetOrientation(NewSetting As Long, chng As Integer, ByVal frm As Form)
Dim PrinterHandle As Long
Dim PrinterName As String
Dim pd As PRINTER_DEFAULTS
Dim MyDevMode As DEVMODE
Dim Result As Long
Dim Needed As Long
Dim pFullDevMode As Long
Dim pi2_buffer() As Long 'This is a block of memory for the Printer_Info_2 structure
'If you need to use the Printer_Info_2 User Defined Type, the
' definition of Printer_Info_2 in the API viewer is incorrect.
' pDevMode and pSecurityDescriptor should be defined As Long.
PrinterName = Printer.DeviceName
If PrinterName = "" Then
Exit Sub
End If
pd.pDatatype = vbNullString
pd.pDevMode = 0&
'Printer_Access_All is required for NT security
pd.DesiredAccess = PRINTER_ALL_ACCESS
Result = OpenPrinter(PrinterName, PrinterHandle, pd)
'The first call to GetPrinter gets the size, in bytes, of the buffer needed.
'This value is divided by 4 since each element of pi2_buffer is a long.
Result = GetPrinter(PrinterHandle, 2, ByVal 0&, 0, Needed)
ReDim pi2_buffer((Needed \ 4))
Result = GetPrinter(PrinterHandle, 2, pi2_buffer(0), Needed, Needed)
'The seventh element of pi2_buffer is a Pointer to a block of memory
' which contains the full DevMode (including the PRIVATE portion).
pFullDevMode = pi2_buffer(7)
'Copy the Public portion of FullDevMode into our DevMode structure
Call CopyMemory(MyDevMode, ByVal pFullDevMode, Len(MyDevMode))
'Make desired changes
MyDevMode.dmDuplex = NewSetting
MyDevMode.dmFields = DM_DUPLEX Or DM_ORIENTATION
MyDevMode.dmOrientation = chng
'Copy our DevMode structure back into FullDevMode
Call CopyMemory(ByVal pFullDevMode, MyDevMode, Len(MyDevMode))
'Copy our changes to "the PUBLIC portion of the DevMode" into "the PRIVATE portion of the DevMode"
Result = DocumentProperties(frm.hWnd, PrinterHandle, PrinterName, ByVal pFullDevMode, ByVal pFullDevMode, DM_IN_BUFFER Or DM_OUT_BUFFER)
'Update the printer's default properties (to verify, go to the Printer folder
' and check the properties for the printer)
Result = SetPrinter(PrinterHandle, 2, pi2_buffer(0), 0&)
Call ClosePrinter(PrinterHandle)
'Note: Once "Set Printer = " is executed, anywhere in the code, after that point
' changes made with SetPrinter will ONLY affect the system-wide printer --
' -- the changes will NOT affect the VB printer object.
' Therefore, it may be necessary to reset the printer object's parameters to
' those chosen in the devmode.
Dim p As Printer
For Each p In Printers
If p.DeviceName = PrinterName Then
Set Printer = p
Exit For
End If
Next p
Printer.Duplex = MyDevMode.dmDuplex
End SubPublic Sub ChngPrinterOrientationLandscape(ByVal frm As Form)
PageDirection = 2
Call SetOrientation(DMDUP_SIMPLEX, PageDirection, frm)
End SubPublic Sub ResetPrinterOrientation(ByVal frm As Form)
If PageDirection = 1 Then
PageDirection = 2
Else
PageDirection = 1
End If
Call SetOrientation(DMDUP_SIMPLEX, PageDirection, frm)
End SubPublic Sub ChngPrinterOrientationPortrait(ByVal frm As Form) PageDirection = 1
Call SetOrientation(DMDUP_SIMPLEX, PageDirection, frm)
End Sub
'***************************************************************
'设置默认打印方向功能模块 Programming:ztchen 2002.5
'用于设置默认打印机的打印方向
'***************************************************************
'可使用的枚举参数，代表打印方向
Public Enum PrinterOrientationConstants
OrientPortrait = 1 '纵向
OrientLandscape = 2 '横向
End Enum'打印机设备设置的信息
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
'该结构的dmFields成员的定义值之一
'用于与成员对应的属性的初始设置
Private Const DM_ORIENTATION = &H1 '打印方向'打印机的默认信息
Private Type PRINTER_DEFAULTS
pDataType As String
pDevMode As Long
DesiredAccess As Long
End Type
'该结构的DesiredAccess成员定义
'用于设置打印机的可访问权限
Private Const PRINTER_ACCESS_ADMINISTER = &H4 '管理员级访问权限
Private Const PRINTER_ACCESS_USE = &H8 '普通用户级访问权限
Private Const STANDARD_RIGHTS_REQUIRED = &HF0000 '标准访问需要
Private Const PRINTER_ALL_ACCESS = (STANDARD_RIGHTS_REQUIRED Or _
PRINTER_ACCESS_ADMINISTER Or PRINTER_ACCESS_USE) '所有访问权限'打印机的详细信息
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'内存拷贝
Private Declare Sub CopyMemory Lib "kernel32" Alias "RtlMoveMemory" _
(hpvDest As Any, hpvSource As Any, ByVal cbCopy As Long)'打开打印机以操作
Private Declare Function OpenPrinter Lib "winspool.drv" Alias _
"OpenPrinterA" (ByVal pPrinterName As String, phPrinter As _
Long, pDefault As Any) As Long
'返回打印机信息
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'设置打印机设置数据及控制打印机操作状态
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'关闭打印机
Private Declare Function ClosePrinter Lib "winspool.drv" _
(ByVal hPrinter As Long) As Long'返回或修改打印机初始信息和显示一个打印机设置对话框
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
'用于指定该函数操作的方式
Private Const DM_IN_BUFFER = 8 '进行输入操作
Private Const DM_OUT_BUFFER = 2 '进行输出操作Public Const ERR_NOPRINTER = "尚未安装打印机。如需安装打印机，请指向Windows“开始”菜单的“设置”，单击“打印机”，然后双击“添加打印机”。按照向导中的说明进行操作即可。"
'设置默认打印机的打印方向
'mp_Orientation：指定打印方向，默认为纵向
'成功返回True，不成功返回False
Public Function SetDefaultPrinterOrientation(Optional ByVal mp_Orientation As PrinterOrientationConstants = 1) As Boolean Dim bytDevMode() As Byte '开辟内存以保存打印机设置信息
' Dim lngOrgOrient As Long '保存原先打印机设置的打印方向
Dim bytPrinterInfo2() As Byte '开辟内存以保存打印机详细设置
Dim hPrinter As Long '打印机的句柄
Dim lResult As Long '检测返回结果
Dim nSize As Long '缓冲区大小
Dim strPrnName As String '打印设备名
Dim dm As DEVMODE '打印机设置信息
Dim pd As PRINTER_DEFAULTS '默认打印机信息
Dim pi2 As PRINTER_INFO_2 '打印机详细信息 '获取默认打印机的设备名
On Error GoTo Err_Hld
strPrnName = Printer.DeviceName
'设置访问打印机所有权限以在NT下能进行访问
pd.DesiredAccess = PRINTER_ALL_ACCESS '打开打印机并获取一个打印机句柄
If OpenPrinter(strPrnName, hPrinter, pd) Then
'实验并获取当前打印机所需要的缓冲区大小
GetPrinter hPrinter, 2&, 0&, 0&, nSize
'根据所获得的缓冲区大小重新分配需要存放打印机详细设置的内存大小
ReDim bytPrinterInfo2(nSize) As Byte
'返回打印机详细信息到所开辟的内存中
lResult = GetPrinter(hPrinter, 2, bytPrinterInfo2(0), _
nSize, nSize)
'执行失败则退出
If lResult = 0 Then
SetDefaultPrinterOrientation = False
ClosePrinter hPrinter
Exit Function
End If
'拷贝打印机详细信息的内容到打印机详细信息结构体
CopyMemory pi2, bytPrinterInfo2(0), Len(pi2) '获取打印机设置信息的缓冲区大小
nSize = DocumentProperties(0, hPrinter, strPrnName, 0, 0, 0)
'根据获得的打印机设置信息缓冲区大小分配相应的内存
ReDim bytDevMode(nSize)
If pi2.pDevMode Then
'如果打印机详细信息结构中的pDevMode成员，
'即打印机设置信息不为空则将其内容拷贝到所开辟的存放打印机设置信息的内存中
'为了操作安全性，拷贝时一定要在pi2.pDevMode上加上ByVal的限制，因为这是个不允许随意改变的指针
CopayMemory bytDevMode(0), ByVal pi2.pDevMode, Len(dm)
Else
'如果为空则使用DocumentProperties函数直接输出打印机设置信息到所开辟的内存中
DocumentProperties 0&, hPrinter, strPrnName, bytDevMode(0), 0&, DM_OUT_BUFFER
End If
'拷贝打印机设置信息内容到打印机设置信息结构体
CopyMemory dm, bytDevMode(0), Len(dm)
With dm
'这里进行新方向的设置
.dmOrientation = mp_Orientation
.dmFields = DM_ORIENTATION
End With
'将新设置好的打印机设置信息拷贝回打印机设置信息内存
CopyMemory bytDevMode(0), dm, Len(dm)
'将新的打印机设置信息设置到打印机初始信息中
DocumentProperties 0&, hPrinter, strPrnName, bytDevMode(0), _
bytDevMode(0), DM_IN_BUFFER Or DM_OUT_BUFFER '将打印机设置信息内存中的内容赋给打印印机详细信息结构的pDevMode成员
'这里需要将该内存的地址传给其成员，因为成员pDevMode是一个指向打印机设置信息结构的内存
pi2.pDevMode = VarPtr(bytDevMode(0))
'用新设置的打印机详细信息对打印机进行设置
lResult = SetPrinter(hPrinter, 2, pi2, 0&)
If lResult = 0 Then
SetDefaultPrinterOrientation = False
ClosePrinter hPrinter
Exit Function
End If
'操作完后关闭打印机并返回成功
Call ClosePrinter(hPrinter)
SetDefaultPrinterOrientation = True
Else
'打开打印机失败则返回失败
SetDefaultPrinterOrientation = False
End If
Exit Function
Err_Hld:
'没有安装打印机错误
If Err.Number = 484 Then
MsgBox ERR_NOPRINTER, vbExclamation, "打印机错误"
SetDefaultPrinterOrientation = False
Exit Function
End If
End Function