Cancelling Dos Shell Program?

[robbaggio]

In my VB prog, there are several buttons that will start up a dos shell and run a program in DOS, until it is complete.
I would like to have a cancel button on my VB main form that when clicked, would cancel the DOS program and close the shell. However, it seems whenever the DOS program is running, my VB from is 'frozen' and i cant click anything until the DOS program finishes. Is there anyway to get around this?

thanks

robbaggio