PRB: GetChunk Corrupts Binary Data on Win98/NT4 SP4

MORE INFORMATION

Steps to Reproduce Behavior

1. Start Microsoft Access and create a new database.
2. Create a new Table and add the following fields:
   
   

   Name	Type
   ID (Primary Key)	AutoNumber
   Picture	OLE Object

3. Save the Table as BinData.
4. Create a new Module and enter the following sample code:

         Sub TestPicIn(sFileName As String)
            Dim db As Database
            Dim rs As Recordset
            Dim sData As String
            Dim nDataSize As Long
   
            Set db = CurrentDb()
            Set rs = db.OpenRecordset("BinData")
            rs.AddNew
               Open sFileName For Binary As #1
                 nDataSize = LOF(1)
                 sData = Space$(nDataSize)
                 Get #1, , sData
               Close #1
            rs!Picture.AppendChunk sData
            rs.Update
         End Sub
   
         Sub TestPicOut(sFileName As String)
            Dim db As Database
            Dim rs As Recordset
            Dim sData As String
            Dim nDataSize As Long
   
            Set db = CurrentDb()
            Set rs = db.OpenRecordset("BinData")
            If Not rs.EOF Then
               nDataSize = rs!Picture.FieldSize
               sData = rs!Picture.GetChunk(0, nDataSize)
   
               Open sFileName For Binary As #2
                 Put #2, , sData
               Close #2
            End If
         End Sub
   					

5. Save the Module.
6. On a Windows 95 computer, type the following in the module's Immediate window. Make sure the file exists at the specified location:

         TestPicIn "C:\Windows\Setup.bmp"
   					

7. Copy the database to a Windows 98 or Windows NT SP4 computer, then open the database. Type the following in the module's Immediate window:

         TestPicOut "C:\Windows\Temp\TestPic.bmp"
   					

   RESULT: The image file is mistakenly converted to Unicode format before being stored to the database. Although it will "decode" correctly if extracted on the same Windows 95 computer that stored the image, when the data is extracted to a file on a Windows 98 computer, the image "decodes" incorrectly causing the new file to appear corrupt.