APIs: Copier une variable ou le contenu d'un contrôle en mémoire	Author(s) Terry Kreft

Copier une variable ou le contenu d'un contrôle en mémoire.

    Pour copier une variable ou le contenu d'n contrôle en mémoire, il faut utiliser des fonctions de l'API. Même si la commande RunCommand possède une constante qui permet de copier des données sur le clipboard (presse-papier), le tout est très dépendant des contrôles du formulaire. Vous devez mettre le contrôle en focus, setFocus, et sélectionner le texte avant d'émettre le commande RunCommand.

    Incluses, quelques fonctions permettant de copier et de coller des données sur ou depuis le Clipboard (presse-papier).

'*********  Code Start  ************
Public Const GHND = &H42
Public Const CF_TEXT = 1
Private Const CF_ANSIONLY = &H400&
Private Const CF_APPLY = &H200&
Private Const CF_BITMAP = 2
Private Const CF_DIB = 8
Private Const CF_DIF = 5
Private Const CF_DSPBITMAP = &H82
Private Const CF_DSPENHMETAFILE = &H8E
Private Const CF_DSPMETAFILEPICT = &H83
Private Const CF_DSPTEXT = &H81
Private Const CF_EFFECTS = &H100&
Private Const CF_ENABLEHOOK = &H8&
Private Const CF_ENABLETEMPLATE = &H10&
Private Const CF_ENABLETEMPLATEHANDLE = &H20&
Private Const CF_ENHMETAFILE = 14
Private Const CF_FIXEDPITCHONLY = &H4000&
Private Const CF_FORCEFONTEXIST = &H10000
Private Const CF_GDIOBJFIRST = &H300
Private Const CF_GDIOBJLAST = &H3FF
Private Const CF_HDROP = 15
Private Const CF_INITTOLOGFONTSTRUCT = &H40&
Private Const CF_LIMITSIZE = &H2000&
Private Const CF_LOCALE = 16
Private Const CF_MAX = 17
Private Const CF_METAFILEPICT = 3
Private Const CF_NOFACESEL = &H80000
Private Const CF_NOSCRIPTSEL = &H800000
Private Const CF_NOSIMULATIONS = &H1000&
Private Const CF_NOSIZESEL = &H200000
Private Const CF_NOSTYLESEL = &H100000
Private Const CF_NOVECTORFONTS = &H800&
Private Const CF_NOOEMFONTS = CF_NOVECTORFONTS
Private Const CF_NOVERTFONTS = &H1000000
Private Const CF_OEMTEXT = 7
Private Const CF_OWNERDISPLAY = &H80
Private Const CF_PALETTE = 9
Private Const CF_PENDATA = 10
Private Const CF_PRINTERFONTS = &H2
Private Const CF_PRIVATEFIRST = &H200
Private Const CF_PRIVATELAST = &H2FF
Private Const CF_RIFF = 11
Private Const CF_SCALABLEONLY = &H20000
Private Const CF_SCREENFONTS = &H1
Private Const CF_BOTH = (CF_SCREENFONTS Or CF_PRINTERFONTS)
Private Const CF_SCRIPTSONLY = CF_ANSIONLY
Private Const CF_SELECTSCRIPT = &H400000
Private Const CF_SHOWHELP = &H4&
Private Const CF_SYLK = 4
Private Const CF_TIFF = 6
Private Const CF_TTONLY = &H40000
Private Const CF_UNICODETEXT = 13
Private Const CF_USESTYLE = &H80&
Private Const CF_WAVE = 12
Private Const CF_WYSIWYG = &H8000

Private Declare Function GlobalAlloc Lib "kernel32" (ByVal wFlags&, ByVal _
  dwBytes As Long) As Long
Private Declare Function GlobalLock Lib "kernel32" (ByVal hMem As Long) _
  As Long
Private Declare Function GlobalSize Lib "kernel32" (ByVal hMem As Long) _
  As Long
Private Declare Function lstrcpy Lib "kernel32" (ByVal lpString1 As Any, _
  ByVal lpString2 As Any) As Long
Private Declare Function lstrlen Lib "kernel32" Alias "lstrlenA" _
  (ByVal lpString As String) As Long

Private Declare Function GlobalUnlock Lib "kernel32" (ByVal hMem As Long) _
  As Long

Private Declare Function OpenClipboard Lib "user32" (ByVal Hwnd As Long) _
  As Long
Private Declare Function CloseClipboard Lib "user32" () As Long
Private Declare Function GetClipboardData Lib "user32" (ByVal wFormat As _
  Long) As Long
Private Declare Function EmptyClipboard Lib "user32" () As Long
Private Declare Function SetClipboardData Lib "user32" (ByVal wFormat _
  As Long, ByVal hMem As Long) As Long

Function ClipBoard_SetText(strCopyString As String) As Boolean
  Dim hGlobalMemory As Long
  Dim lpGlobalMemory As Long
  Dim hClipMemory As Long

  ' Allouer de la mémoire relocalisable globale
  '-------------------------------------------
  hGlobalMemory = GlobalAlloc(GHND, Len(strCopyString) + 1)

  ' Verrouiller le bloc afin d'obtenir un pointeur éloigné
  ' sur cette mémoire
  lpGlobalMemory = GlobalLock(hGlobalMemory)

  ' Copier la chaîne dans cette mémoire
  lpGlobalMemory = lstrcpy(lpGlobalMemory, strCopyString)

  ' Relâche la mémoire et copier sur le clipboard
  If GlobalUnlock(hGlobalMemory) = 0 Then
    If OpenClipboard(0&) <> 0 Then
      Call EmptyClipboard
      hClipMemory = SetClipboardData(CF_TEXT, hGlobalMemory)
      ClipBoard_SetText = CBool(CloseClipboard)
    End If
  End If
End Function

Function ClipBoard_GetText() As String
  Dim hClipMemory As Long
  Dim lpClipMemory As Long
  Dim strCBText As String
  Dim RetVal As Long
  Dim lngSize As Long
  If OpenClipboard(0&) <> 0 Then
    ' Mettre la main sur le bloc de mémoire
    ' référé par le texte
    hClipMemory = GetClipboardData(CF_TEXT)
    If hClipMemory <> 0 Then
      ' Verrouiller la mémoiure du Clipboard qu'on puisse reférer
      ' à la chaîne actuelle
      lpClipMemory = GlobalLock(hClipMemory)
      If lpClipMemory <> 0 Then
        lngSize = GlobalSize(lpClipMemory)
        strCBText = Space$(lngSize)
        RetVal = lstrcpy(strCBText, lpClipMemory)
        RetVal = GlobalUnlock(hClipMemory)
        ' Éplucher le caractère null
        strCBText = left(strCBText, InStr(1, strCBText, Chr$(0), 0) - 1)
      Else
        MsgBox "Could not lock memory to copy string from."
      End If
    End If
    Call CloseClipboard
  End If
  ClipBoard_GetText = strCBText
End Function

Function CopyOlePiccy(Piccy As Object)
  Dim hGlobalMemory As Long, lpGlobalMemory As Long
  Dim hClipMemory As Long, X As Long

  ' Allouer de la mémoire relocalisable globale
  '-------------------------------------------
  hGlobalMemory = GlobalAlloc(GHND, Len(Piccy) + 1)

  ' Verrouiller ce bloc pour obtenir un " far pointer"
  ' à cette mémoire
  lpGlobalMemory = GlobalLock(hGlobalMemory)


  'Il faut copier l'objet en mémoire, 

  lpGlobalMemory = lstrcpy(lpGlobalMemory, Piccy)

  ' Relâche le verrou sur la mémoire
  If GlobalUnlock(hGlobalMemory) <> 0 Then
    MsgBox "Could not unlock memory location. Copy aborted."
    GoTo OutOfHere2
  End If

  ' Ouvre le Clipboard pour y copier les données
  If OpenClipboard(0&) = 0 Then
    MsgBox "Could not open the Clipboard. Copy aborted."
    Exit Function
  End If

  ' Nettoyage du Clipboard.
  X = EmptyClipboard()

  ' Copier les données du Clipboard.
  hClipMemory = SetClipboardData(CF_TEXT, hGlobalMemory)

OutOfHere2:
  If CloseClipboard() = 0 Then
    MsgBox "Could not close Clipboard."
  End If
End Function
'*********  Code End   ************