捕获屏幕快照 - Office中国论坛/Access中国论坛

'原文：http://support.microsoft.com/?kbid=210108

Type RECT_Type

left As Long
top As Long
right As Long
bottom As Long

End Type

'The following declare statements are case sensitive.

Declare Function GetActiveWindow Lib "User32" () As Long
Declare Function GetDesktopWindow Lib "User32" () As Long
Declare Sub GetWindowRect Lib "User32" (ByVal hWnd As Long, _
lpRect As RECT_Type)
Declare Function GetDC Lib "User32" (ByVal hWnd As Long) As Long
Declare Function CreateCompatibleDC Lib "Gdi32" (ByVal hdc As Long) _
As Long
Declare Function CreateCompatibleBitmap Lib "Gdi32" (ByVal hdc _
As Long, ByVal nWidth As Long, _
ByVal nHeight As Long) As Long
Declare Function SelectObject Lib "Gdi32" (ByVal hdc As Long, _
ByVal hObject As Long) As Long
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
Declare Function OpenClipboard Lib "User32" (ByVal hWnd As Long) As Long
Declare Function EmptyClipboard Lib "User32" () As Long
Declare Function SetClipboardData Lib "User32" (ByVal wFormat As Long, _
ByVal hMem As Long) As Long
Declare Function CloseClipboard Lib "User32" () As Long
Declare Function ReleaseDC Lib "User32" (ByVal hWnd As Long, _
ByVal hdc As Long) As Long
Declare Function DeleteDC Lib "Gdi32" (ByVal hdc As Long) As Long

Global Const SRCCOPY = &HCC0020
Global Const CF_BITMAP = 2

Function ScreenDump()
Dim AccessHwnd As Long, DeskHwnd As Long
Dim hdc As Long
Dim hdcMem As Long
Dim RECT As RECT_Type
Dim junk As Long
Dim fwidth As Long, fheight As Long
Dim hBitmap As Long

DoCmd.Hourglass True

'---------------------------------------------------
' Get window handle to Windows and Microsoft Access
'---------------------------------------------------
DeskHwnd = GetDesktopWindow()
AccessHwnd = GetActiveWindow()

'---------------------------------------------------
' Get screen coordinates of Microsoft Access
'---------------------------------------------------
Call GetWindowRect(AccessHwnd, RECT)
fwidth = RECT.right - RECT.left
fheight = RECT.bottom - RECT.top

'---------------------------------------------------
' Get the device context of Desktop and allocate memory
'---------------------------------------------------
hdc = GetDC(DeskHwnd)
hdcMem = CreateCompatibleDC(hdc)
hBitmap = CreateCompatibleBitmap(hdc, fwidth, fheight)

If hBitmap <> 0 Then
junk = SelectObject(hdcMem, hBitmap)

'---------------------------------------------
' Copy the Desktop bitmap to memory location
' based on Microsoft Access coordinates.
'---------------------------------------------
junk = BitBlt(hdcMem, 0, 0, fwidth, fheight, hdc, RECT.left, _
RECT.top, SRCCOPY)

'---------------------------------------------
' Set up the Clipboard and copy bitmap
'---------------------------------------------
junk = OpenClipboard(DeskHwnd)
junk = EmptyClipboard()
junk = SetClipboardData(CF_BITMAP, hBitmap)
junk = CloseClipboard()
End If

'---------------------------------------------
' Clean up handles
'---------------------------------------------
junk = DeleteDC(hdcMem)
junk = ReleaseDC(DeskHwnd, hdc)

DoCmd.Hourglass False

End Function