Yakalama ve ekran, bir form veya herhangi bir pencere Yazdýr

Bu makalede, bir form veya pencereyi ekranýn bir Visual Basic resim nesnesine dahil olmak üzere gösterilmiþtir. Bir kez ekran resmi resim nesnesinde yakalanmýþ olmasý, Visual Basic yazýcý nesnesi PaintPicture yöntemini kullanarak kolayca yazdýrýlabilir.

Eklenen örnek resimleri yakalamak için birçok kullanýþlý yordamlar saðlar. Tüm kullanýlan yordamlarýnýn hem 16 ve 32-bit altýnda Windows platformlarý çalýþmak için yazýlmýþtýr ve tam palet desteði içerir. Örnekte yordamlarý kullanabilirsiniz:

• Bir formun tüm içeriði yakalayýn.
• Istemci form alanýnýn yakalayýn.
• Tüm ekraný yakalar.
• Etkin pencereyi ekranda yakalayýn.
• Bir tanýtýcý için verilen herhangi bir pencerenin herhangi bir bölümünü yakalayýn.
• Bir resim bir bit eþlem ve paleti oluþturun.
• Mümkün olduðunca büyük bir resim nesnesi sayfada yazdýr.

Visual Basic 4.0 yeni bir resim nesnesi kullanýlmaya baþlandý. Resim nesnesi gerçekte bir standart OLE türüdür ve belgelenen denetim Developer's Kit'te (CDK.)

CDK Visual Basic 4.0 yeni bir resim nesneleri oluþturmak için kullanabileceðiniz OleCreatePictureIndirect iþlevi içerir. Yordam, bir tanýtýcý bir bit eþlem ve bir palet için bir tanýtýcý bir resim nesnesi oluþturmak için OleCreatePictureIndirect CreateBitmapPicture örnekte çaðýrýr. Resmi geçerli palet içeriyorsa, resim ekran veya yazýcý iþlerken kullanmak için Visual Basic bilirsiniz. CreateBitmapPicture yordamýna CaptureWindow yordamý tarafýndan bir kýsmýný veya tamamýný bir pencereyi, bir bit eþlem'i içeren bir resim nesneleri oluþturmak için kullanýlýr.

Örnek CaptureWindow</a1> yordamýnda bir pencere tanýtýcýsý verilen bir pencerenin herhangi bir bölümünü yakalar. Yordam için pencereyi yakalamak için tam bir bölümünü tanýmlayan birkaç parametre içerir. Pencere çalýþýr kopyalayarak yakalama ekrandaki bir pencereye yeni bir bit eþlem görüntüsünü. Ayrýca bkz: ekran paleti vardýr ve bu durumda, bir kopyasýný saðlar denetler. CaptureWindow, daha sonra palette ve yeni oluþturulan bir bit eþlem bit eþlem yapýsý için CreateBitmapPicture çaðýrýr.

Tüm örnek dahil CaptureForm CaptureClient, CaptureScreen ve CaptureActiveWindow yordamlar CaptureWindow belirli windows yakalamak için kullanýn. CaptureForm ve CaptureClient hem Yakalama penceresini arayýn ve bir form nesnesi <a1>hWnd</a1> özelliðini iletmektir. CaptureScreen yalnýzca masaüstü penceresinde tanýtýcýsýný alýr ve CaptureWindow çaðýrýr. Benzer þekilde, CaptureActiveWindow yalnýzca etkin pencerenin pencere tanýtýcýsý alýr ve CaptureWindow çaðýrýr.

Istediðiniz resmi bir resim nesnesi yakalanýr sonra Visual Basic 4.0 içinde <a0>Yazýcý</a0> nesnesinin PaintPicture yöntemini kullanarak yazdýrmak kolay bir iþlemdir. Örneðin sayfanýn basýlabilir alanýnýn içinde mümkün olduðunca büyük yakalanan görüntüleri yazdýrmak için PaintPictureMethod kullanan PrintPictureToFitPage yordamýný saðlar.

ÖRNEK

1. Yeni bir proje baþlatýn. Varsayýlan olarak, Form1 oluþturulur.
2. Formun sol kenarýndaki altý CommandButtons yerleþtirin.
3. Bir resmi kutusunu sað tarafýndaki düðmeleri forma yerleþtirin.
4. Aþaðýdaki kodu Form1 yerleþtirin:

         '--------------------------------------------------------------------
         ' 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
         '--------------------------------------------------------------------
   
   					

5. Proje (varsayýlan olarak module1) yeni bir standart modül ekleyin.
6. Yeni modüle aþaðýdaki kodu yerleþtirin:

         '--------------------------------------------------------------------
         '''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''
         '
         ' Visual Basic 4.0 16/32 Capture Routines
         '
         ' This module contains several routines for capturing windows into a
         ' picture.  All the routines work on both 16 and 32 bit Windows
         ' platforms.
         ' The routines also have palette support.
         '
         ' CreateBitmapPicture - Creates a picture object from a bitmap and
         ' palette.
         ' CaptureWindow - Captures any window given a window handle.
         ' CaptureActiveWindow - Captures the active window on the desktop.
         ' CaptureForm - Captures the entire form.
         ' CaptureClient - Captures the client area of a form.
         ' CaptureScreen - Captures the entire screen.
         ' PrintPictureToFitPage - prints any picture as big as possible on
         ' the page.
         '
         ' NOTES
         '    - No error trapping is included in these routines.
         '''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''
         '
         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
   
         #If Win32 Then
   
            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
   
         #ElseIf Win16 Then
   
            Private Const RASTERCAPS As Integer = 38
            Private Const RC_PALETTE As Integer = &H100
            Private Const SIZEPALETTE As Integer = 104
   
            Private Type RECT
               Left As Integer
               Top As Integer
               Right As Integer
               Bottom As Integer
            End Type
   
            Private Declare Function CreateCompatibleDC Lib "GDI" ( _
               ByVal hDC As Integer) As Integer
            Private Declare Function CreateCompatibleBitmap Lib "GDI" ( _
               ByVal hDC As Integer, ByVal nWidth As Integer, _
               ByVal nHeight As Integer) As Integer
            Private Declare Function GetDeviceCaps Lib "GDI" ( _
               ByVal hDC As Integer, ByVal iCapabilitiy As Integer) As Integer
            Private Declare Function GetSystemPaletteEntries Lib "GDI" ( _
               ByVal hDC As Integer, ByVal wStartIndex As Integer, _
               ByVal wNumEntries As Integer, _
               lpPaletteEntries As PALETTEENTRY) As Integer
            Private Declare Function CreatePalette Lib "GDI" ( _
               lpLogPalette As LOGPALETTE) As Integer
            Private Declare Function SelectObject Lib "GDI" ( _
               ByVal hDC As Integer, ByVal hObject As Integer) As Integer
            Private Declare Function BitBlt Lib "GDI" ( _
               ByVal hDCDest As Integer, ByVal XDest As Integer, _
               ByVal YDest As Integer, ByVal nWidth As Integer, _
               ByVal nHeight As Integer, ByVal hDCSrc As Integer, _
               ByVal XSrc As Integer, ByVal YSrc As Integer, _
               ByVal dwRop As Long) As Integer
            Private Declare Function DeleteDC Lib "GDI" ( _
               ByVal hDC As Integer) As Integer
            Private Declare Function GetForegroundWindow Lib "USER" _
               Alias "GetActiveWindow" () As Integer
            Private Declare Function SelectPalette Lib "USER" ( _
               ByVal hDC As Integer, ByVal hPalette As Integer, ByVal _
               bForceBackground As Integer) As Integer
            Private Declare Function RealizePalette Lib "USER" ( _
               ByVal hDC As Integer) As Integer
            Private Declare Function GetWindowDC Lib "USER" ( _
               ByVal hWnd As Integer) As Integer
            Private Declare Function GetDC Lib "USER" ( _
               ByVal hWnd As Integer) As Integer
            Private Declare Function GetWindowRect Lib "USER" ( _
               ByVal hWnd As Integer, lpRect As RECT) As Integer
            Private Declare Function ReleaseDC Lib "USER" ( _
               ByVal hWnd As Integer, ByVal hDC As Integer) As Integer
            Private Declare Function GetDesktopWindow Lib "USER" () As Integer
   
            Private Type PicBmp
               Size As Integer
               Type As Integer
               hBmp As Integer
               hPal As Integer
               Reserved As Integer
            End Type
   
            Private Declare Function OleCreatePictureIndirect _
               Lib "oc25.dll" ( PictDesc As PicBmp, RefIID As GUID, _
               ByVal fPictureOwnsHandle As Integer, IPic As IPicture) _
               As Integer
   
         #End If
   
         '''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''
         '
         ' CreateBitmapPicture
         '    - Creates a bitmap type Picture object from a bitmap and
         '      palette.
         '
         ' hBmp
         '    - Handle to a bitmap.
         '
         ' hPal
         '    - Handle to a Palette.
         '    - Can be null if the bitmap doesn't use a palette.
         '
         ' Returns
         '    - Returns a Picture object containing the bitmap.
         '''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''
         '
         #If Win32 Then
            Public Function CreateBitmapPicture(ByVal hBmp As Long, _
               ByVal hPal As Long) As Picture
   
               Dim r As Long
         #ElseIf Win16 Then
            Public Function CreateBitmapPicture(ByVal hBmp As Integer, _
               ByVal hPal As Integer) As Picture
   
               Dim r As Integer
         #End If
            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
   
         '''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''
         '
         ' CaptureWindow
         '    - Captures any portion of a window.
         '
         ' hWndSrc
         '    - Handle to the window to be captured.
         '
         ' Client
         '    - If True CaptureWindow captures from the client area of the
         '      window.
         '    - If False CaptureWindow captures from the entire window.
         '
         ' LeftSrc, TopSrc, WidthSrc, HeightSrc
         '    - Specify the portion of the window to capture.
         '    - Dimensions need to be specified in pixels.
         '
         ' Returns
         '    - Returns a Picture object containing a bitmap of the specified
         '      portion of the window that was captured.
         '''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''
         ''''''
         '
         #If Win32 Then
            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
         #ElseIf Win16 Then
            Public Function CaptureWindow(ByVal hWndSrc As Integer, _
               ByVal Client As Boolean, ByVal LeftSrc As Integer, _
               ByVal TopSrc As Integer, ByVal WidthSrc As Long, _
               ByVal HeightSrc As Long) As Picture
   
               Dim hDCMemory As Integer
               Dim hBmp As Integer
               Dim hBmpPrev As Integer
               Dim r As Integer
               Dim hDCSrc As Integer
               Dim hPal As Integer
               Dim hPalPrev As Integer
               Dim RasterCapsScrn As Integer
               Dim HasPaletteScrn As Integer
               Dim PaletteSizeScrn As Integer
         #End If
            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
   
         '''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''
         '
         ' CaptureScreen
         '    - Captures the entire screen.
         '
         ' Returns
         '    - Returns a Picture object containing a bitmap of the screen.
         '''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''
         '
         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
   
         '''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''
         '
         ' CaptureForm
         '    - Captures an entire form including title bar and border.
         '
         ' frmSrc
         '    - The Form object to capture.
         '
         ' Returns
         '    - Returns a Picture object containing a bitmap of the entire
         '      form.
         '''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''
         '
         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
   
         '''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''
         '
         ' CaptureClient
         '    - Captures the client area of a form.
         '
         ' frmSrc
         '    - The Form object to capture.
         '
         ' Returns
         '    - Returns a Picture object containing a bitmap of the form's
         '      client area.
         '''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''
         '
         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
   
         '''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''
         '
         ' CaptureActiveWindow
         '    - Captures the currently active window on the screen.
         '
         ' Returns
         '    - Returns a Picture object containing a bitmap of the active
         '      window.
         '''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''
         '
         Public Function CaptureActiveWindow() As Picture
            #If Win32 Then
               Dim hWndActive As Long
               Dim r As Long
            #ElseIf Win16 Then
               Dim hWndActive As Integer
               Dim r As Integer
            #End If
            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
   
         '''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''
         '
         ' PrintPictureToFitPage
         '    - Prints a Picture object as big as possible.
         '
         ' Prn
         '    - Destination Printer object.
         '
         ' Pic
         '    - Source Picture object.
         '''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''
         '
         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
         '--------------------------------------------------------------------
   					

7. Projeyi kaydedin.
8. Bu proje çalýþtýrmadan önce Project References ' [NULL]'Otomasyonu için bir baþvuru (StdOle2.tlb) bulunduðunu doðrulayýn.
9. Proje ve sýnama'yý çalýþtýrýn. Formun, form istemci alanýnýn, ekran ve etkin pencere yakalama açabilmelisiniz. Bunlardan birine yazdýramýyor de olur.

Not: Bir resim nesnesi istediðiniz resmi yakaladýðýnýz sonra kolayca SetData yöntemiyle <a0>Pano</a0> nesnesinin panoya yerleþtirebilirsiniz.

Ek bilgi için, Microsoft Bilgi Bankasý'ndaki makaleleri görüntülemek üzere aþaðýdaki makale numaralarýný týklatýn: