I think if you closed a program
taskkill /f /im "winamp.exe"
//....(winamp.exe is example)...
end, so if you want to start a program that you can use
start "" /normal winamp.exe
(/norma,/max/min are that process value cpu)
ALSO
if you want command line without openning an new window you write that
/B is Start application without creating a new window. The application has ^C handling ignored. Unless the application enables ^C processing, ^Break is the only way to interrupt the application.