how to bind a command to the open button

[susan]

Hi,
 Anybody knows how to bind a command to the open button at a file
browser dialog? I want to add selected files to a scrolllist.

Like this:

def browseFile(self):

        file = askopenfilename(filetypes = [("TDF Files", "*.TDF"),
("All Files", "*.*")],multiple=1)
        
        ?.....

Thanks!

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