Not understanding GtkTargetEntry

[Chris Seaton <chris chrisseaton com>]

I'm trying to get my app to do drag and drop but I'm getting a bit confused.

I want to call gtk_drag_dest_set on my widget, but I have to supply an 
array of GtkTargetEntry structs to tell GTK what types of data my widget 
will accept being dropped onto it. I looked into setting these up but 
the manual and tutorial only talk vaguely about setting the target field 
of these GtkTargetEntry structs to "a string representing the drag 
type". Nowhere does it say what this string is supposed to be. I want to 
accept the dropping of files onto my widget, so is it something like "file"?

Thanks.

Chris Seaton