Using Edges & Corners

we can use edges and corners.
while i try to close a program i have to go right corner and back little bit and then click ( if my prg. is not maximized).
if we use corners then we can only move our hand to one side.

if we thinks about same thing to left and right sides of screen, they can use for back and forward in appropriate positions. And may be they can give programs as an action.

is this work ?

edit:

sorry, i couldnt say really what i mean.

there is a bar in opera, an i am using all-in-one extension in firefox, and i am using a window theme that i can close only this move :
right-up corner and click
and i am using KMenu on left-down side.

i mean we can use every edge and corner with clicks ( size of bars sould be configurable ).
and specially, when an application doesnt maximized the close button isnt top-right corner, i want to use this corner every time.