怎样用bitblt将屏幕(包括鼠标)都搞到picture控件里？

我这有一个参考资料
'--------------------------------------------------------------------
'''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''
'
' Visual Basic 32-Bit Capture Routines
'
' This module contains several routines for capturing windows into a
' picture.
' 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 0Private Type PALETTEENTRY
   peRed As Byte
   peGreen As Byte
   peBlue As Byte
   peFlags As Byte
End TypePrivate Type LOGPALETTE
   palVersion As Integer
   palNumEntries As Integer
   palPalEntry(255) As PALETTEENTRY  ' Enough for 256 colors.
End TypePrivate Type GUID
   Data1 As Long
   Data2 As Integer
   Data3 As Integer
   Data4(7) As Byte
End TypePrivate Const RASTERCAPS As Long = 38
Private Const RC_PALETTE As Long = &H100
Private Const SIZEPALETTE As Long = 104Private Type RECT
   Left As Long
   Top As Long
   Right As Long
   Bottom As Long
End TypePrivate 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 LongPrivate Type PicBmp
   Size As Long
   Type As Long
   hBmp As Long
   hPal As Long
   Reserved As Long
End TypePrivate Declare Function OleCreatePictureIndirect Lib "olepro32.dll" (PicDesc As PicBmp, RefIID As GUID, ByVal fPictureOwnsHandle As Long, IPic As IPicture) As Long' 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
'''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''
'
' 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.
'''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''
'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'''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''
'
' 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.
'''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''
''''''
'  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'''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''
'
' CaptureScreen
'    - Captures the entire screen.
'
' Returns
'    - Returns a Picture object containing a bitmap of the screen.
'''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''
'
Public Function CaptureScreen() As Picture
  Dim hWndScreen As Long   ' 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    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'''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''
'
' 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
'-------------------------------------------------------------------
Private Sub Command7_Click()CommonDialog1.DefaultExt = ".BMP"
CommonDialog1.Filter = "Bitmap Image (*.bmp)|*.bmp"
CommonDialog1.ShowSave
If CommonDialog1.FileName <> "" Then
    SavePicture Picture1.Picture, CommonDialog1.FileName
End IfEnd Sub

BitBlt取得屏幕
然后Get....Pos取得鼠标位置，
然后直接将鼠标绘制上去
鼠标是直接绘制的，高于屏幕，所以无法捕获

'----------------------------------------------------------------------------
'
'Author:lihonggen0
'Date:2002-6-19
'功能：抓屏
'----------------------------------------------------------------------------
Private Type POINTAPI
    x As Long
    y As Long
End Type
Private Declare Function BitBlt Lib "gdi32" (ByVal hDestDC As Long, ByVal x As Long, ByVal y As Long, ByVal nWidth As Long, ByVal nHeight As Long, ByVal hSrcDC As Long, ByVal xSrc As Long, ByVal ySrc As Long, ByVal dwRop As Long) As Long
Private Declare Function GetDC Lib "user32" (ByVal hwnd As Long) As Long
Private Declare Function GetCursorPos Lib "user32" (lpPoint As POINTAPI) As Long
Private Declare Function DrawIcon Lib "user32" (ByVal hdc As Long, ByVal x As Long, ByVal y As Long, ByVal hIcon As Long) As Long
Private Declare Function ReleaseDC Lib "user32" (ByVal hwnd As Long, ByVal hdc As Long) As LongPrivate Sub Command1_Click()
    Dim hdc As Long
    Dim sw As Integer
    Dim sh As Integer
    Dim CurPos As POINTAPI
    Dim Cur As Long
    Me.Hide
    DoEvents
    Picture1.AutoRedraw = True
    hdc = GetDC(0)
    GetCursorPos CurPos
    Cur = GetCursor
    Picture1.Width = Screen.Width
    Picture1.Height = Screen.Height
    sw = Screen.Width / Screen.TwipsPerPixelX
    sh = Screen.Height / Screen.TwipsPerPixelY
    BitBlt Picture1.hdc, 0, 0, sw, sh, hdc, 0, 0, vbSrcCopy
    Me.Show
    DrawIcon Picture1.hdc, CurPos.x - 10, CurPos.y - 10, Cur
    ReleaseDC 0, hdc
    Picture1.AutoRedraw = FalseEnd Sub

调试易

怎样用bitblt将屏幕(包括鼠标)都搞到picture控件里？

解决方案 »