>>>Extend the list... you asked how, and I gave an example of syntax.
>>>
>>>You can list multiple extensions -
>>>?GETFILE("excel linen:xls,xlsx,xlt;in a word, ID:doc,dot,docx;powerplant perfectation:ppt","Gimme some","open up")
>>>
>>>As to what... I don't know all the extensions, and that's more in the "what" part of the question, which is, I guess, your homework.
>>
>>That's the thing - I'm wondering if there is other way to get all the possible document extensions. I don't know about drawing extensions either - don't have such files at home.
>
>Гугл с тобой знает все...

:) I didn't try yet - right now I'm a bit stuck - I want to show multiple extensions in one go and could not get it yet right.