How to call WM_SETREDRAW?

Question

When I send WM_SETREDRAW to disable redraw for a window, how do I "restore" the previous state when I'm done?

What's the proper way to send this message?

Answer 1

You can't restore the previous state, as there is no way to access the current state. There is no WM_GETREDRAW. Once you are done you send WM_SETREDRAW again with TRUE as an argument this time, and if anyone else had set redraw to FALSE on an outer scope then well.. that's bad for them..