Starcraft 2 resolution/windowed mode question

hey I have a question. I want to have starcraft 2 on windowed fullscreen but the problem is that when I do that the resolution switches to 1680x1050 and that reduces my FPS alot. I usually play at 1280x768 i think. I am wondering if there is any way to make it that i can set it to windowed fullscreen without it raising the resolution? maby some changes in variables.txt or something. Thanks plz reply :o

Windowed-fullscreen uses your desktop resolution. There is no way around that. Use normal fullscreen mode if you have to. I am assuming your desktop is set to 1680x1050 because your question has been brought up before by others.