Globally intercept window movement

Question

I am having trouble getting a global system hook to work. I want to be notified whenever a window is moving, as early as possible, and change the window size. This means the CBT

Answer 1

Hooks are pretty heavy. You only want to use them when you absolutely have to.

That said, you could use one of the basic hooks simply as a way to get into the process. Once in the process, you could subclass the window you're interested in and handle the sizing messages in your subclass proc rather than trying to catch everything at the hook level.

Depending on what you want to do in response to the resize, you might need some interprocess communication.