Using Call Executable Step To Start EXE and Stop EXE

I would like to use the Call Executable step to Start an EXE (Executable) file which will run until I call another step to tell it to stop in my test sequence.  Basically, I want to be able to turn on the EXE and turn off the EXE when I want to inside the test sequence.  The EXE continuously pings a device.  Is there an efficient way to do this?  Thanks!