Today I was watching some video tutorials and I found out about Vanishing Point.
Vanishing Point lets you clone, heal, select something that is not quite easy to select using just Marquee tool and transform objects. You’ll find this tool in Filter menu.
I'll take this picture below and I’ll show you an example of what you can do with VP :)

Then go to Filter – Vanishing Point.
Go to the toolbox in the left and select Create plane tool. It’s usually selected.
Put your mouse pointer in the right corner at the top of the window from the right side of the picture and click. Click again on the left corner of the window from the left side, like you see in the picture below.
For the next step I’ll select the window from the right side. To make the selection easier so I don’t have to zoom and see if my selection is ok I’ll select the Transform Toll in order to increase the size of the grid and then to be able to select the area around the window.
Now select Marquee Tool and select the window.
Ok .. so far so good.
But because I selected outside the window too, I have now a piece of the shadow from the original window. That’s good because that way I can show you how to use the Stamp tool. The way you’ll use it is pretty much the same way the Stamp Tool always worked in Photoshop.
In the image below you can see that the Heal is turned on and we don’t want that in this case. Turn it off and do it again.
Click Ok.
You will see that Photoshop put the new window in the layer you created at the beginning.
Here is the final photo:

I hope you liked it !