I know many of you are using Bluestacks software right now...
So, here is another tip for the users of Bluestacks.....

CHANGING THE WINDOW SIZE OF BLUESTACKS
1) Click WINDOWS+R and enter regedit in the space provided...

2) Then, a popup will open....Click Yes
3) Then the registry Editor window will open....

4) Now go to HKEY_LOCAL_MACHINE/SOFTWARE/Bluestacks/Android/FrameBuffer/0 by clicking the arrow on the left side of the Key......

5) Then change the values of Width and Height to the value you need it to be as shown below.....

6) Just double click width/height...
7) Enter the value(in Decimal)  and click OK...

Dats it..... :)

Go and check your bluestacks window in a new size.... :D