请问如何用vb截取屏幕,并保存到硬盘啊?
小弟拜求高手赐教,救小弟一命
请给原代码!
小弟拜求高手赐教,救小弟一命
请给原代码!
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GetDC(0)
BitBlt
GetDIBits
要代码的话去找楼下的要
Private Declare Function SelectObject Lib "gdi32" (ByVal hdc As Long, ByVal hObject As Long) As LongPrivate Sub Form_Load()
Dim hBitmap As Integer
Me.AutoRedraw = True
hBitmap = CreateCompatibleBitmap(Me.hdc, 0, 0)
SelectObject Me.hdc, hBitmap
End Sub
Begin VB.Form Form1
Caption = "Form1"
ClientHeight= 2550
ClientLeft= 60
ClientTop = 345
ClientWidth = 4680
LinkTopic = "Form1"
ScaleHeight = 2550
ScaleWidth= 4680
StartUpPosition = 3\'Windows Default
Begin VB.TextBox Text4
Height= 270
Left= 1080
TabIndex= 6
Top = 1920
Width = 615
End
Begin VB.TextBox Text3
Height= 270
Left= 240
TabIndex= 5
Top = 1920
Width = 615
End
Begin VB.TextBox Text2
Height= 270
Left= 1080
TabIndex= 4
Top = 1680
Width = 615
End
Begin VB.TextBox Text1
Height= 270
Left= 240
TabIndex= 3
Top = 1680
Width = 615
End
Begin VB.CommandButton Command3
Caption = "Command3"
Height= 495
Left= 120
TabIndex= 2
Top = 1080
Width = 1695
End
Begin VB.CommandButton Command2
Caption = "Command2"
Height= 495
Left= 120
TabIndex= 1
Top = 240
Width = 1695
End
Begin VB.PictureBox Picture1
AutoSize= -1\'True
Height= 2415
Left= 2040
ScaleHeight = 2355
ScaleWidth= 2475
TabIndex= 0
Top = 120
Width = 2535
End
End
Attribute VB_Name = "Form1"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = False
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
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
Private Sub Command2_Click()
SavePicture CaptureScreen(), "c:\\1.bmp"
Set Picture1.Picture = CaptureScreen
End Sub
Public Function CreateBitmapPicture(ByVal hBmp As Long, ByVal hPal As Long) As Picture
Dim r As LongDim 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 FunctionPublic 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 PictureDim 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 LOGPALETTEIf Client Then
hDCSrc = GetDC(hWndSrc)
Else
hDCSrc = GetWindowDC(hWndSrc)
End IfhDCMemory = 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, Text1.Text, Text2.Text, Text3.Text, Text4.Text)
End Function
把以上保存为FORM1.FRM.再打开.