Microsoft KB Archive/148392

= ACC: How to Capture Screens of Your Forms (95/97) =

Article ID: 148392

Article Last Modified on 1/19/2007

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APPLIES TO


 * Microsoft Access 95 Standard Edition
 * Microsoft Access 97 Standard Edition

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This article was previously published under Q148392



SUMMARY
Advanced: Requires expert coding, interoperability, and multiuser skills.

You can use Microsoft Windows API functions to capture screen shots of any object on the Microsoft Windows desktop. You can capture screen shots of the Microsoft Access user interface, Microsoft Access objects, other Microsoft Windows applications, or the entire desktop.

This article assumes that you are familiar with Visual Basic for Applications and with creating Microsoft Access applications using the programming tools provided with Microsoft Access. For more information about Visual Basic for Applications, please refer to your version of the "Building Applications with Microsoft Access" manual.



MORE INFORMATION
The following sample Visual Basic for Applications code captures an object on the screen in the Clipboard. Note that you can change the handle AccessHwnd in the sample code below to create screen shots of other applications, including specific objects within Microsoft Access.

After capturing a screen shot, you can open Paint (Pbrush.exe) and click the Paste command on the Edit menu. The screen shot from Microsoft Access is loaded into the Paint window.

To run this code, call the ScreenDump function from an event, a macro, or the module's Debug window. To run ScreenDump from the Debug window, type the following, and then press ENTER:

?ScreenDump

To set up the ScreenDump function, open a new or existing module and insert the code listed below.

NOTE: You may have some Microsoft Windows API functions defined in an existing Microsoft Access library; therefore, your declarations may be duplicates. If you receive a duplicate procedure name error message, remove or comment out the declarations statement in your code.

Insert the following code into the Declarations section of your module: Option Compare Database Option Explicit 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 Code for the ScreenDump Function: 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

