Using + to execute two callbacks

I had seen this in the documentation and puzzled why one would need this. I now have a use for it. In fact, I could use more, but that's asking for a lot!!

It worked well. I attach two callbacks to a control, and used %ud as well. Experimentation shows that the USER_DATA is passed to **both **callback routines. This gives me a great flexibility.

Finding small differences in the way 8.60 issues messages (new ones popped up), but no problems at all.

Good job, Silverfrost!

It was hard to find. Look at the end of the 'Standard call-back functions'. I had run across it in another context at some point and found it interesting. If you look at %aw, you'll see it used.