Forms :: Continuous Subform - Control To Display Image / Icon Based On Another Field

I have a continuous subform which queries a table of attachments. I'm using Access 2007 but not using the Attachment datatype; this DB will grow considerably and I don't want to waste precious space by filling it with bulky files. So instead, I have code which makes a copy of the attachment and adds the hyperlink (to the copy) to the table instead.

Now - I want to add a control to the subform to display an icon / image reflecting the file type of the attachment (Word doc, Excel s/s, PDF etc.)

But not sure how to go about it.

I was thinking I could use FileSystemObject.GetFileExtension at the point in the code where the attachment is added, and add a new field to my attachments table (i.e. translate "*.xls*" to "Excel", etc.) Then store / embed a handful of images for the core types I would expect and use an image control on the subform to display the image based on the value of that field.

But is that even possible / feasible?

Or, is there a handy API which can retrieve the icon associated with a file type based on what has been installed on the local machine (even if there is, there's still the problem of setting up the image control to display the appropriate icon specific to each record...)

Or, is there another control available which would be better suited to something like this than an Image control?