I have the hook thingies on my windows and they can stand extremely high winds with no problem. My windows are more than 100 years old and still on their hinges....
some of the bedroom windows have an extra small hook for the window to be just ajar.
The push bar mentioned above does not go with inside screens when the bar is half way. It is fine though if the bar is all the way in or all the way out (window fully open or fully closed).
I also have a diffenent kind of contraption that works perfect with the screens:
I have seen it for sale somewhere (not sure where) and it is kind of pricey for what it is.