This trick is useful for not so good computer.
1. go to your warcraft folder then make a shortcut of "Frozen Throne.exe"
2. In your desktop right click "Shortcut to Frozen Throne.exe" then choose properties
3. Now in properties add "-window" in the target. it should be like this:
4. Done, you can now play DOTA in window mode!
note: your cursor will overlap while playing. Labels: How To