请问在VB6中如何将两个窗体打印到同的页A4的纸上？

把所有内容画到PictureBox里面,用下面语句打印
Printer.PaintPicture Picture1.Picture

to dbcontrols:
请问如何把窗体的内容存为图像呢？

下面代码演示屏幕复制与窗体复制为图象
Form1
'--------------------------------------------------------------------
      ' Capture the entire screen.      Private Sub Command1_Click()
         Set Picture1.Picture = CaptureScreen()
      End Sub      ' Capture the entire form including title and border.
      Private Sub Command2_Click()
         Set Picture1.Picture = CaptureForm(Me)
      End Sub      ' Capture the client area of the form.
      Private Sub Command3_Click()
         Set Picture1.Picture = CaptureClient(Me)
      End Sub      ' Capture the active window after two seconds.
      Private Sub Command4_Click()
         MsgBox "Two seconds after you close this dialog " & _
            "the active window will be captured."         ' Wait for two seconds.
         Dim EndTime As Date
         EndTime = DateAdd("s", 2, Now)
         Do Until Now > EndTime
            DoEvents
         Loop         Set Picture1.Picture = CaptureActiveWindow()         ' Set focus back to form.
         Me.SetFocus
      End Sub      ' Print the current contents of the picture box.
      Private Sub Command5_Click()
         PrintPictureToFitPage Printer, Picture1.Picture
         Printer.EndDoc
      End Sub      ' Clear out the picture box.
      Private Sub Command6_Click()
         Set Picture1.Picture = Nothing
      End Sub      ' Initialize the form and controls.
      Private Sub Form_Load()
         Me.Caption = "Capture and Print Example"
         Command1.Caption = "&Screen"
         Command2.Caption = "&Form"
         Command3.Caption = "&Client"
         Command4.Caption = "&Active"
         Command5.Caption = "&Print"
         Command6.Caption = "C&lear"
         Picture1.AutoSize = True
      End Sub
      '--------------------------------------------------------------------

Module:
-------------------------------------------------
      Option Explicit
      Option Base 0      Private Type PALETTEENTRY
         peRed As Byte
         peGreen As Byte
         peBlue As Byte
         peFlags As Byte
      End Type      Private Type LOGPALETTE
         palVersion As Integer
         palNumEntries As Integer
         palPalEntry(255) As PALETTEENTRY  ' Enough for 256 colors.
      End Type      Private Type GUID
         Data1 As Long
         Data2 As Integer
         Data3 As Integer
         Data4(7) As Byte
      End Type
         Private Const RASTERCAPS As Long = 38
         Private Const RC_PALETTE As Long = &H100
         Private Const SIZEPALETTE As Long = 104         Private Type RECT
            Left As Long
            Top As Long
            Right As Long
            Bottom As Long
         End Type         Private Declare Function CreateCompatibleDC Lib "GDI32" ( _
            ByVal hDC As Long) As Long
         Private Declare Function CreateCompatibleBitmap Lib "GDI32" ( _
            ByVal hDC As Long, ByVal nWidth As Long, _
            ByVal nHeight As Long) As Long
         Private Declare Function GetDeviceCaps Lib "GDI32" ( _
            ByVal hDC As Long, ByVal iCapabilitiy As Long) As Long
         Private Declare Function GetSystemPaletteEntries Lib "GDI32" ( _
            ByVal hDC As Long, ByVal wStartIndex As Long, _
            ByVal wNumEntries As Long, lpPaletteEntries As PALETTEENTRY) _
            As Long
         Private Declare Function CreatePalette Lib "GDI32" ( _
            lpLogPalette As LOGPALETTE) As Long
         Private Declare Function SelectObject Lib "GDI32" ( _
            ByVal hDC As Long, ByVal hObject As Long) As Long
         Private Declare Function BitBlt Lib "GDI32" ( _
            ByVal hDCDest As Long, ByVal XDest As Long, _
            ByVal YDest As Long, ByVal nWidth As Long, _
            ByVal nHeight As Long, ByVal hDCSrc As Long, _
            ByVal XSrc As Long, ByVal YSrc As Long, ByVal dwRop As Long) _
            As Long
         Private Declare Function DeleteDC Lib "GDI32" ( _
            ByVal hDC As Long) As Long
         Private Declare Function GetForegroundWindow Lib "USER32" () _
            As Long
         Private Declare Function SelectPalette Lib "GDI32" ( _
            ByVal hDC As Long, ByVal hPalette As Long, _
            ByVal bForceBackground As Long) As Long
         Private Declare Function RealizePalette Lib "GDI32" ( _
            ByVal hDC As Long) As Long
         Private Declare Function GetWindowDC Lib "USER32" ( _
            ByVal hWnd As Long) As Long
         Private Declare Function GetDC Lib "USER32" ( _
            ByVal hWnd As Long) As Long
         Private Declare Function GetWindowRect Lib "USER32" ( _
            ByVal hWnd As Long, lpRect As RECT) As Long
         Private Declare Function ReleaseDC Lib "USER32" ( _
            ByVal hWnd As Long, ByVal hDC As Long) As Long
         Private Declare Function GetDesktopWindow Lib "USER32" () As Long         Private Type PicBmp
            Size As Long
            Type As Long
            hBmp As Long
            hPal As Long
            Reserved As Long
         End Type         Private Declare Function OleCreatePictureIndirect _
            Lib "olepro32.dll" ( PicDesc As PicBmp, RefIID As GUID, _
            ByVal fPictureOwnsHandle As Long, IPic As IPicture) As Long         Public Function CreateBitmapPicture(ByVal hBmp As Long, _
            ByVal hPal As Long) As Picture            Dim r As Long
         Dim Pic As PicBmp
         ' IPicture requires a reference to "Standard OLE Types."
         Dim IPic As IPicture
         Dim IID_IDispatch As GUID         ' Fill in with IDispatch Interface ID.
         With IID_IDispatch
            .Data1 = &H20400
            .Data4(0) = &HC0
            .Data4(7) = &H46
         End With         ' Fill Pic with necessary parts.
         With Pic
            .Size = Len(Pic)          ' Length of structure.
            .Type = vbPicTypeBitmap   ' Type of Picture (bitmap).
            .hBmp = hBmp              ' Handle to bitmap.
            .hPal = hPal              ' Handle to palette (may be null).
         End With         ' Create Picture object.
         r = OleCreatePictureIndirect(Pic, IID_IDispatch, 1, IPic)         ' Return the new Picture object.
         Set CreateBitmapPicture = IPic
      End Function         Public Function CaptureWindow(ByVal hWndSrc As Long, _
            ByVal Client As Boolean, ByVal LeftSrc As Long, _
            ByVal TopSrc As Long, ByVal WidthSrc As Long, _
            ByVal HeightSrc As Long) As Picture            Dim hDCMemory As Long
            Dim hBmp As Long
            Dim hBmpPrev As Long
            Dim r As Long
            Dim hDCSrc As Long
            Dim hPal As Long
            Dim hPalPrev As Long
            Dim RasterCapsScrn As Long
            Dim HasPaletteScrn As Long
            Dim PaletteSizeScrn As Long
         Dim LogPal As LOGPALETTE         ' Depending on the value of Client get the proper device context.
         If Client Then
            hDCSrc = GetDC(hWndSrc) ' Get device context for client area.
         Else
            hDCSrc = GetWindowDC(hWndSrc) ' Get device context for entire
                                          ' window.
         End If

         ' Create a memory device context for the copy process.
         hDCMemory = CreateCompatibleDC(hDCSrc)
         ' Create a bitmap and place it in the memory DC.
         hBmp = CreateCompatibleBitmap(hDCSrc, WidthSrc, HeightSrc)
         hBmpPrev = SelectObject(hDCMemory, hBmp)         ' Get screen properties.
         RasterCapsScrn = GetDeviceCaps(hDCSrc, RASTERCAPS) ' Raster
                                                            ' capabilities.
         HasPaletteScrn = RasterCapsScrn And RC_PALETTE       ' Palette
                                                              ' support.
         PaletteSizeScrn = GetDeviceCaps(hDCSrc, SIZEPALETTE) ' Size of
                                                              ' palette.         ' If the screen has a palette make a copy and realize it.
         If HasPaletteScrn And (PaletteSizeScrn = 256) Then
            ' Create a copy of the system palette.
            LogPal.palVersion = &H300
            LogPal.palNumEntries = 256
            r = GetSystemPaletteEntries(hDCSrc, 0, 256, _
                LogPal.palPalEntry(0))
            hPal = CreatePalette(LogPal)
            ' Select the new palette into the memory DC and realize it.
            hPalPrev = SelectPalette(hDCMemory, hPal, 0)
            r = RealizePalette(hDCMemory)
         End If         ' Copy the on-screen image into the memory DC.
         r = BitBlt(hDCMemory, 0, 0, WidthSrc, HeightSrc, hDCSrc, _
            LeftSrc, TopSrc, vbSrcCopy)      ' Remove the new copy of the  on-screen image.
         hBmp = SelectObject(hDCMemory, hBmpPrev)         ' If the screen has a palette get back the palette that was
         ' selected in previously.
         If HasPaletteScrn And (PaletteSizeScrn = 256) Then
            hPal = SelectPalette(hDCMemory, hPalPrev, 0)
         End If         ' Release the device context resources back to the system.
         r = DeleteDC(hDCMemory)
         r = ReleaseDC(hWndSrc, hDCSrc)         ' Call CreateBitmapPicture to create a picture object from the
         ' bitmap and palette handles. Then return the resulting picture
         ' object.
         Set CaptureWindow = CreateBitmapPicture(hBmp, hPal)
      End Function
      '
      Public Function CaptureScreen() As Picture
         #If Win32 Then
            Dim hWndScreen As Long
         #ElseIf Win16 Then
            Dim hWndScreen As Integer
         #End If         ' Get a handle to the desktop window.
         hWndScreen = GetDesktopWindow()         ' Call CaptureWindow to capture the entire desktop give the handle
         ' and return the resulting Picture object.         Set CaptureScreen = CaptureWindow(hWndScreen, False, 0, 0, _
            Screen.Width \ Screen.TwipsPerPixelX, _
            Screen.Height \ Screen.TwipsPerPixelY)
      End Function      '
      Public Function CaptureForm(frmSrc As Form) As Picture
         ' Call CaptureWindow to capture the entire form given its window
         ' handle and then return the resulting Picture object.
         Set CaptureForm = CaptureWindow(frmSrc.hWnd, False, 0, 0, _
            frmSrc.ScaleX(frmSrc.Width, vbTwips, vbPixels), _
            frmSrc.ScaleY(frmSrc.Height, vbTwips, vbPixels))
      End Function      '
      Public Function CaptureClient(frmSrc As Form) As Picture
         ' Call CaptureWindow to capture the client area of the form given
         ' its window handle and return the resulting Picture object.
         Set CaptureClient = CaptureWindow(frmSrc.hWnd, True, 0, 0, _
            frmSrc.ScaleX(frmSrc.ScaleWidth, frmSrc.ScaleMode, vbPixels), _
            frmSrc.ScaleY(frmSrc.ScaleHeight, frmSrc.ScaleMode, vbPixels))
      End Function      '
      Public Function CaptureActiveWindow() As Picture
            Dim hWndActive As Long
            Dim r As Long
         Dim RectActive As RECT         ' Get a handle to the active/foreground window.
         hWndActive = GetForegroundWindow()         ' Get the dimensions of the window.
         r = GetWindowRect(hWndActive, RectActive)         ' Call CaptureWindow to capture the active window given its
         ' handle and return the Resulting Picture object.
      Set CaptureActiveWindow = CaptureWindow(hWndActive, False, 0, 0, _
            RectActive.Right - RectActive.Left, _
            RectActive.Bottom - RectActive.Top)
      End Function      '
      Public Sub PrintPictureToFitPage(Prn As Printer, Pic As Picture)
         Const vbHiMetric As Integer = 8
         Dim PicRatio As Double
         Dim PrnWidth As Double
         Dim PrnHeight As Double
         Dim PrnRatio As Double
         Dim PrnPicWidth As Double
         Dim PrnPicHeight As Double         ' Determine if picture should be printed in landscape or portrait
         ' and set the orientation.
         If Pic.Height >= Pic.Width Then
            Prn.Orientation = vbPRORPortrait   ' Taller than wide.
         Else
            Prn.Orientation = vbPRORLandscape  ' Wider than tall.
         End If         ' Calculate device independent Width-to-Height ratio for picture.
         PicRatio = Pic.Width / Pic.Height         ' Calculate the dimentions of the printable area in HiMetric.
         PrnWidth = Prn.ScaleX(Prn.ScaleWidth, Prn.ScaleMode, vbHiMetric)
         PrnHeight = Prn.ScaleY(Prn.ScaleHeight, Prn.ScaleMode, vbHiMetric)
         ' Calculate device independent Width to Height ratio for printer.
         PrnRatio = PrnWidth / PrnHeight         ' Scale the output to the printable area.
         If PicRatio >= PrnRatio Then
            ' Scale picture to fit full width of printable area.
            PrnPicWidth = Prn.ScaleX(PrnWidth, vbHiMetric, Prn.ScaleMode)
            PrnPicHeight = Prn.ScaleY(PrnWidth / PicRatio, vbHiMetric, _
               Prn.ScaleMode)
         Else
            ' Scale picture to fit full height of printable area.
            PrnPicHeight = Prn.ScaleY(PrnHeight, vbHiMetric, Prn.ScaleMode)
            PrnPicWidth = Prn.ScaleX(PrnHeight * PicRatio, vbHiMetric, _
               Prn.ScaleMode)
         End If         ' Print the picture using the PaintPicture method.
         Prn.PaintPicture Pic, 0, 0, PrnPicWidth, PrnPicHeight
      End Sub

调试易

请问在VB6中如何将两个窗体打印到同的页A4的纸上？

解决方案 »