Forms :: Display Flag Corresponding To Selection In Combo Box

I'm trying to create an access database to make an inventory of my model trains.

I have a main entry form (frmTrain) where I enter all sorts of info regarding e.g. a locomotive. This info is then stored in a table (tblTrain).

In the main entry form, I've put a combo box (cmbCountries) linked to a query (qryCountries) which queries the country codes from a table (tblCountries) that has three fields:

ID (autonumber)
CountryCode (short text) (containing the country codes UK, FR, DE, ...)
FlagFile (short text) (containing the name of the flag picture, e.g. UK.png)

The flags are stored as *.png files in a folder Flags that is in the same folder as the database file. I have chosen this approach instead of putting the flag pictures in an OLE field in tblCountries because I'd like to avoid being stuck to *.bmp files (don't support transparency). I'd also like to avoid having to mention the complete file path in the field FlagFile

I created a form (frmCountries) to easily add countries to tblCountries as needed.

Now back to the main entry form. The selection made in cmbCountries is stored in the field 'Countries' in tblTrain. When a country is selected in cmbCountries, I'd like that the corresponding flag is displayed next to the combo box.

I found an example on the web where an image field was used to display the flag, let's say with the following code:

Private Sub cmbCountries_Change()
Me.ImageFieldName.Picture = Me.cmbCountries.Column(2)
End Sub

Private Sub Form_Load()
Me.ImageFieldName.Picture = Me.cmbCountries.Column(2)
End Sub

and where the combo box had as row source (not using qryCountries):

SELECT tblCountries.ID, tblCountries.CountryCode, [Application].[CurrentProject].[path] & "Flags" & [FlagFile] AS Expr1 FROM tblCountries ORDER BY tblCountries.[Code];

The problem with this example is that, if you select in frmTrain e.g. UK, the UK flag is then displayed across all records in frmTrain. So the image field is not the appropriate field to display the flag in frmTrain and I guess an unbound/bound (?) object frame should rather be used.

How to display correctly the flag picture for every individual record in frmTrain corresponding to the country chosen in cmbCountries.