In C, if I have a window handle from another app, obtained by wind_find(), and I want to send a message (WM_ARROWED in this case) to that window, how can I proceed?
appl_write() needs the the app id. I cannot use appl_find() to get it because I don't know the filename. Using appl_write(0, ...) works for the desktop windows only. Using shel_write(7, ...) broadcasts the message to all processes, that works as I want, but requires AES 4.0.