Also, the newer awning windows have a locking lug that is activated if the window crank is turned of a turn after the window is closed. Do not help the thief steal your property. Sliding glass windows can be secured in the same manner as a sliding glass doors. Pins through the frame, screws in the track or keyed locks can all be used. The recommendations made for securing sliding glass doors on the handout titled sliding glass doors also apply to sliding glass windows.
Casement windows provide good security.
Keyed locks are also available for this type of window. Jalousie windows are a very high security risk and should be replaced if at all possible. They can be secured by installing metal grating on the inside of the window area with a quick release feature in the event of fire. At a comparable cost to installing grating, the windows can be replaced with another, which offers better security.