copyscreen.bas

OpenPlayer代码

Attribute VB_Name = "CopyScreen"
'====================================================
'拷屏并保存图片的模块
'====================================================
Option Explicit
Option Base 0

Public Type PALETTEENTRY
   peRed As Byte
   peGreen As Byte
   peBlue As Byte
   peFlags As Byte
End Type

Public Type LOGPALETTE
   palVersion As Integer
   palNumEntries As Integer
   palPalEntry(255) As PALETTEENTRY
End Type

Public Type GUID
   Data1 As Long
   Data2 As Integer
   Data3 As Integer
   Data4(7) As Byte
End Type

Public Const RASTERCAPS As Long = 38
Public Const RC_PALETTE As Long = &H100
Public Const SIZEPALETTE As Long = 104

'Public Type RECT
'   Left As Long
'   Top As Long
'   Right As Long
'   Bottom As Long
'End Type

Public Declare Function CreateCompatibleDC Lib "GDI32" (ByVal hDC As Long) As Long
Public Declare Function CreateCompatibleBitmap Lib "GDI32" (ByVal hDC As Long, _
        ByVal nWidth As Long, ByVal nHeight As Long) As Long
Public Declare Function GetDeviceCaps Lib "GDI32" (ByVal hDC As Long, ByVal _
        iCapabilitiy As Long) As Long
Public Declare Function GetSystemPaletteEntries Lib "GDI32" (ByVal hDC As Long, _
        ByVal wStartIndex As Long, ByVal wNumEntries As Long, lpPaletteEntries _
        As PALETTEENTRY) As Long
Public Declare Function CreatePalette Lib "GDI32" (lpLogPalette As LOGPALETTE) _
        As Long
Public Declare Function SelectObject Lib "GDI32" (ByVal hDC As Long, ByVal hObject _
        As Long) As Long
Public 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
Public Declare Function DeleteDC Lib "GDI32" (ByVal hDC As Long) As Long
Public Declare Function GetForegroundWindow Lib "user32" () As Long
Public Declare Function SelectPalette Lib "GDI32" (ByVal hDC As Long, ByVal hPalette _
        As Long, ByVal bForceBackground As Long) As Long
Public Declare Function RealizePalette Lib "GDI32" (ByVal hDC As Long) As Long
Public Declare Function GetWindowDC Lib "user32" (ByVal hwnd As Long) As Long
Public Declare Function GetDC Lib "user32" (ByVal hwnd As Long) As Long
Public Declare Function GetWindowRect Lib "user32" (ByVal hwnd As Long, lpRect As RECT) As Long
Public Declare Function ReleaseDC Lib "user32" (ByVal hwnd As Long, ByVal hDC As _
        Long) As Long
Public Declare Function GetDesktopWindow Lib "user32" () As Long

Public Type PicBmp
   Size As Long
   Type As Long
   hBmp As Long
   hPal As Long
   Reserved As Long
End Type

Public 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
   Dim IPic As IPicture
   Dim IID_IDispatch As GUID

   '填充IDispatch界面
   With IID_IDispatch
      .Data1 = &H20400
      .Data4(0) = &HC0
      .Data4(7) = &H46
   End With

   '填充Pic
   With Pic
      .Size = Len(Pic)          ' Pic结构长度
      .Type = vbPicTypeBitmap   ' 图象类型
      .hBmp = hBmp              ' 位图句柄
      .hPal = hPal              ' 调色板句柄
   End With

   '建立Picture图象
   r = OleCreatePictureIndirect(Pic, IID_IDispatch, 1, IPic)

   '返回Picture对象
   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

    If Client Then
        hDCSrc = GetDC(hWndSrc)
    Else
        hDCSrc = GetWindowDC(hWndSrc)
    End If

    hDCMemory = CreateCompatibleDC(hDCSrc)
    hBmp = CreateCompatibleBitmap(hDCSrc, WidthSrc, HeightSrc)
    hBmpPrev = SelectObject(hDCMemory, hBmp)

    '获得屏幕属性
    RasterCapsScrn = GetDeviceCaps(hDCSrc, RASTERCAPS)
    HasPaletteScrn = RasterCapsScrn And RC_PALETTE
    PaletteSizeScrn = GetDeviceCaps(hDCSrc, SIZEPALETTE)

    '如果屏幕对象有调色板则获得屏幕调色板
    If HasPaletteScrn And (PaletteSizeScrn = 256) Then
        '建立屏幕调色板的拷贝
        LogPal.palVersion = &H300
        LogPal.palNumEntries = 256
        r = GetSystemPaletteEntries(hDCSrc, 0, 256, LogPal.palPalEntry(0))
        hPal = CreatePalette(LogPal)
        '将新建立的调色板选如建立的内存绘图句柄中
        hPalPrev = SelectPalette(hDCMemory, hPal, 0)
        r = RealizePalette(hDCMemory)
    End If

    '拷贝图象
    r = BitBlt(hDCMemory, 0, 0, WidthSrc, HeightSrc, hDCSrc, LeftSrc, TopSrc, vbSrcCopy)

    hBmp = SelectObject(hDCMemory, hBmpPrev)

    If HasPaletteScrn And (PaletteSizeScrn = 256) Then
        hPal = SelectPalette(hDCMemory, hPalPrev, 0)
    End If

    '释放资源
    r = DeleteDC(hDCMemory)
    r = ReleaseDC(hWndSrc, hDCSrc)

    Set CaptureWindow = CreateBitmapPicture(hBmp, hPal)
End Function
'capturescreen函数捕捉整个屏幕图象
Public Function CaptureScreen() As Picture
    Dim hWndScreen As Long

    '获得桌面的窗口句柄
    hWndScreen = GetDesktopWindow()
    Set CaptureScreen = CaptureWindow(hWndScreen, False, 0, 0, Screen.Width _
        \ Screen.TwipsPerPixelX, Screen.Height \ Screen.TwipsPerPixelY)
End Function


'===============================
'保存当前活动窗口图片
'===============================
Public Function CaptureActiveWindow(hFlashHnd As Long) As Picture
    Dim hWndActive As Long
    Dim r As Long
    Dim RectActive As RECT
    
    Play.SetFocus
    hWndActive = hFlashHnd                    '要保存的窗口Hwnd ,swflash控件的Hwnd
    Play.SetFocus                             '激活
    SetWindowPos Play.hwnd, -1, 0, 0, 0, 0, 3 '设在最前面
    r = GetWindowRect(hWndActive, RectActive)
    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
  
    If Pic.Height >= Pic.Width Then
        Prn.Orientation = vbPRORPortrait
    Else
        Prn.Orientation = vbPRORLandscape
    End If
  
    PicRatio = Pic.Width / Pic.Height
  
    PrnWidth = Prn.ScaleX(Prn.ScaleWidth, Prn.ScaleMode, vbHiMetric)
    PrnHeight = Prn.ScaleY(Prn.ScaleHeight, Prn.ScaleMode, vbHiMetric)
    PrnRatio = PrnWidth / PrnHeight
  
    If PicRatio >= PrnRatio Then
        PrnPicWidth = Prn.ScaleX(PrnWidth, vbHiMetric, Prn.ScaleMode)
        PrnPicHeight = Prn.ScaleY(PrnWidth / PicRatio, vbHiMetric, Prn.ScaleMode)
    Else
        PrnPicHeight = Prn.ScaleY(PrnHeight, vbHiMetric, Prn.ScaleMode)
        PrnPicWidth = Prn.ScaleX(PrnHeight * PicRatio, vbHiMetric, Prn.ScaleMode)
    End If
  
    Prn.PaintPicture Pic, 0, 0, PrnPicWidth, PrnPicHeight
End Sub

'====================================================
'保存PictrueBox中的图片的过程序
'====================================================
Public Sub SavePic(PicBox As PictureBox)
On Error Resume Next
    Dim bmpFileName As String
    bmpFileName = Left(Play.ShockwaveFlash1.Movie, InStrRev(Play.ShockwaveFlash1.Movie, ".") - 1) & Play.ShockwaveFlash1.FrameNum & ".bmp"
    bmpFileName = ShowSaveDialog(Play, "位图文件", "*.bmp", "保存文件...", "bmp", bmpFileName)
    If bmpFileName <> "" Then
       SavePicture PicBox.Picture, bmpFileName
    End If


End Sub