What is hDC when Displaying DIBs in an Access form

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  • kentgorrell
    New Member
    • Jul 2007
    • 11

    What is hDC when Displaying DIBs in an Access form

    Further to an earlier post I have made progress and can now display a DIB (Device Independent Bitmap) on a VB6 form using this code.
    [CODE=vb] Set Field = Adodc1.Recordse t.Fields.Item(" Student_Photo")
    If IsNull(Field.Va lue) = False Then
    ByteArray() = Field.Value
    hSizeIn = Field.ActualSiz e
    'Copy the memory inside the Gobal memory
    hMemIn = GlobalAlloc(GME M_SHARE, hSizeIn)
    pMem = GlobalLock(hMem In)
    CopyMemory ByVal pMem, ByteArray(0), hSizeIn
    GlobalUnlock hMemIn
    'Use the N5GetDibFunctio n to unpack the Blob
    hMemOut = N5GetDib(hMemIn )
    GlobalFree hMemIn
    If hMemOut <> 0 Then
    hSizeOut = GlobalSize(hMem Out)
    pMem = GlobalLock(hMem Out)
    ReDim ByteArray(hSize Out)
    CopyMemory ByteArray(0), ByVal pMem, hSizeOut
    CopyMemory BInfoHeader, ByteArray(0), Len(BInfoHeader )
    StartDib = Len(BInfoHeader ) + PaleteSize(BInf oHeader)
    CopyMemory ByVal pMem, ByteArray(Start Dib), hSizeOut - StartDib
    hDibOpen = DrawDibOpen()
    xSize = (Picture1.Width / Screen.TwipsPer PixelX)
    ySize = (Picture1.Heigh t / Screen.TwipsPer PixelX)
    If (hDibOpen <> 0) And (hDibOpen <> -1) Then
    TempResult = DrawDibDraw(hDi bOpen, Picture1.hDC, 0, 0, xSize, ySize, BInfoHeader, ByVal pMem, 0, 0, BInfoHeader.biW idth, BInfoHeader.biH eight, 0)
    If TempResult = 0 Then
    MsgBox "Error Drawing DIB"
    End If
    End If
    End If[/CODE]

    but I cannot find an equivalent in Access for picture.hDC, anyone have any idea?
    Last edited by Killer42; Jul 30 '07, 02:27 AM. Reason: Added [CODE=vb] tag
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