How to reset the progress bar when in pulse mode

[Colossus <colossus 3000 it>]

Hi,

I use the progress bar in pulse mode since I don't know the amount of
bytes to process. When the byte processing is finished the "pulse" (I 
don't know if it is correct to call it like this) remains inside the 
progress bar. Is there a way to "reset" the progress bar so that when 
the processing has ended the progress bar remains empty as when my 
program starts ?

Thank you,
--
Colossus
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