Multiple file types in sUser- GetFileDialog() ?

Question

I'm using the GetFileDialog function of the AIUser suite.
I'd like three options in the file type popup below the file list (Labeled "Enable:"), such as:
All Recognized files types ("jpg", "jpeg", "gif")
JPEG files ("jpg", "jpeg"")
GIF filess ("gif")
But I can only make it work with one extension per item in the popup.
Hence in the example below, only filters[1] and filters[2] work.
static bool
PickImageFile( ai::FilePath &filePath)
    AIPlatformFileDlgOpts options;
#ifdef MAC_ENV
    const short ftCount = 3;
    AIPlatformFileDlgOpts::PopupFilter filters[ftCount];
    //All recognized types
    filters[0].fDesc = ai::UnicodeString("All Recognized Files");
    filters[0].fExtension = ai::UnicodeString("jpg gif");           // << WHAT TO SPECIFY HERE ?
    filters[0].fCreatorType.creator = '????';
    filters[0].fCreatorType.type = '????';
    // ESRI Shape file
    filters[1].fDesc = ai::UnicodeString("JPEG Image (jpg)");
    filters[1].fExtension = ai::UnicodeString("jpg");
    filters[1].fCreatorType.creator = '????';
    filters[1].fCreatorType.type = '????';
    // Ocad Files Template Files
    filters[2].fDesc = ai::UnicodeString("GIF Image (gif)");
    filters[2].fExtension = ai::UnicodeString("gif");
    filters[2].fCreatorType.creator = '????';
    filters[2].fCreatorType.type = '????';
    options.SetFilterArray(filters, ftCount);
#endif
    AIErr result = sUser->GetFileDialog( ai::UnicodeString( "Import Image"),
                    &options, true, filePath);
    return (result == 0);
Anyone knowing the trick?

Answer 1

In looking at the Windows AddFilter function, patterns are separated with semi-colons, such as "*.jpg;*.jpeg".  I don't have a Mac so I can't test this out though.