Access - Export images from Image controls in forms - ms-access

Question

I have been searching for a way to extract images from access forms. A search on Google will nearly always point to OLEtoDisk. This software allows to export images stored in OLE fields inside access tables. This is not what I want.
I have a form with some logos, headers and background images. Those images are making the database become bigger and bigger (because they are embedded in the form). I would extract them, place them on our server together with the back-end file and add them back to my forms but this time as linked images instead of embedded images.
I hope I am making myself clear. Any suggestions are welcome.
EDIT : Added the code I'm using to export an Image control's PictureData as an image file. This code doesn't work as intended. I found out that PictureData is a byte array but after copying it in a file, I get one NUL character every two characters.
Public Function savePict(pImage As Access.Image)
Dim fname As String 'The name of the file to save the picture to
Dim iFileNum As Double
fname = Environ("Temp") + "\temp.png" ' Destination file path
iFileNum = FreeFile 'The next free file from the file system
Open fname For Binary Access Write As iFileNum
Dim tbyte As Variant
Dim i As Double
'Write the byte array to the file
For i = 0 To Len(pImage.PictureData)
Put #iFileNum, , pImage.PictureData(i)
Next i
Close #iFileNum
End Function

Answer 1

The picture data is an EMF file, with a wrapper of 8 bytes.
This is your routine modified to use the correct file extension
Public Function savePict(pImage As Access.Image)
Dim fname As String 'The name of the file to save the picture to
Dim iFileNum As Double
Dim bArray() As Byte, cArray() As Byte
Dim lngRet As Long
fname = Environ("Temp") + "\temp.emf" ' Destination file path
iFileNum = FreeFile 'The next free file from the file system
' Resize to hold entire PictureData prop
ReDim bArray(LenB(pImage.PictureData) - 1)
' Resize to hold the EMF wrapped in the PictureData prop
ReDim cArray(LenB(pImage.PictureData) - (1 + 8))
' Copy to our array
bArray = pImage.PictureData
For lngRet = 8 To UBound(cArray)
cArray(lngRet - 8) = bArray(lngRet)
Next
Open fname For Binary Access Write As iFileNum
'Write the byte array to the file
Put #iFileNum, , cArray
Close #iFileNum
End Function

Answer 2

Finally here is the code that worked as intended : Export a PNG image from a form's Image control.
Public Function savePict(pImage As Access.Image)
Dim fname As String 'The name of the file to save the picture to
fname = Environ("Temp") + "\temp.png" ' Destination file path
Dim iFileNum As Double
iFileNum = FreeFile 'The next free file from the file system
Dim pngImage As String 'Stores the image data as a string
pngImage = StrConv(pImage.PictureData, vbUnicode) 'Convert the byte array to a string
'Writes the string to the file
Open fname For Binary Access Write As iFileNum
Put #iFileNum, , pngImage
Close #iFileNum
End Function

Answer 3

Take your form that has a background image or AutoFormat that you like
Right-click on the form in the Navigation Pane and select Export >> XML
On the first page of the wizard, select a destination to drop some files (Desktop is fine)
A small dialog will then appear with three check boxes
Select the first option (Data) and third option (Presentation) and then click OK
Click the Close button on the last page of the wizard after the export is complete

Answer 4

If you are looking to re-use the image in another access database (ie you lost the original image file, but want to use it elsewhere), a far easier method would be to import the object (form, report etc) into your new Access database using the External Data -> Access menu.
You can then just copy paste the image control where you want to use it...
Unfortunately copy/paste of image controls between Access databases doesnt work as you'd like.