TDBImage vs Paradox table:BMP,PCX,TIF,GIF,EPS...

I have a TDBImage, with a TField of type Graphic. Paradox tables only
supports fields Graphics from files BMP,PCX,TIF, GIF and EPS. So, the
question is, when I try to do a PasteFromClipboard() in the TDBImage, I must
to check if the file is one of those.
Anyone has an idea of how can I do that?

Thanks in advance.