OK ..

here i rephrase my question

i have installed oracle forms runtime on my system . and nothing else
so i am able to connect to forms runtime .. and i have installed toad . even that i sconnecting ..

but now i whave installed weblogic in my box ..
it needs oracle drivers .. does this need oracle client to be installed ?? ( ofcourse we can have weblogic thin drivers )
but for oracle drivers do we need to have oracle client installed . if connection is established isn't that enough ??