Editbox, Read-Only, Display Screwing up when scrolling

[pbrama]

We have a multi-line editbox with scrollbars. Because it is used to only display a message, we have it set for READ-ONLY. Problem is, when you scroll it, the lines start overlapping. If you click&drag through the messed up text, it appears.

I turned OFF the READ-ONLY, and it works just fine.

Is there a problem with READ-ONLY and scrollbars?

Attached is a picture of the READ-ONLY messed up display.

[VictorN]

Is it the same problem as you began to ask here, but then cancelled to reply?

Could you prepare very small and easy working project reproducing such a behaviour and post it in zip archive to the forum?

PS please, don't include .ncb, .aps, .opt, .clw files nor DEBUG/RELEASE folders.

[pbrama]

Yes, you are correct, it is the same problem.... except now, I know what is causing it. Just not sure if it is a bug in VC++ or something else.

Originally I thought it was some sort of memory overflow issue trashing the display memory. But with alot more testing... the code works as expected... ONLY if the Editbox is set NOT set for READ-ONLY. Just changing that one check mark, causes the display screw up when scrolled. If I leave it off, it scrolls perfectly.

So, that is why I am posting again about this issue... it HAS something to do with the READ-ONLY option.


I even took the liberty of finding "another" multi-line edit box, in another dialog, and flipped that one to READ-ONLY. Same thing happened.

[GCDEF]

Perhaps you should just use a listbox instead.

[pbrama]

Hmmmm, dang, never thought about that.... that may be the RIGHT way to handle this. Originally needed to allow for editing in the box so it was originally designed with an editbox but when we decided to make it a READ-ONLY scrollable box, never thought about changing it.

I will have to give that a try and see if It will work.