Accessing an Access OLE Object Field

Hello
I have an image stored in an Access Database Table. This image is stored
in a OLE Object Field. Now I want to convert the OLE object to a BMP
file but I dont know how to create the OLE Object out of the BLOB data.
I found a way in the www but it depends on the image format (find the
BM, GIF or JFIF header in the BLOB data), but in this case this is a
properitary image format within the OLE object.

So I need to create the OLE Object out of the blob data. Can somebody
help me?

thx
  Michael