HWND hwnd = cocos2d::Director::getInstance()->getOpenGLView()->getWin32Window();
LONG style = GetWindowLong(hwnd, GWL_STYLE);
style &= ~(WS_CAPTION | WS_THICKFRAME | WS_MINIMIZEBOX | WS_MAXIMIZEBOX | WS_SYSMENU);
SetWindowLong(hwnd, GWL_STYLE, style);