Thanks Dave, I tried looking out for OSProcess and CommandShell.
I would like to tell the precise requirement which I am trying to do, I am
developing this for windows and using scratch. 
I have to call an external executable once the scratch programming is over.
As scratch is developed using squeak I thought to ask the question over here
too.
I tried installing commandShell in scratch source opened in squeak.exe but
didn't got any option to do so.

Is this the right approach I am following ?

Thanks,
Arunabh

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