How do I turn Textbox Autoscrolling On/Off?

[Russ Ryba]

I'm working on a chat application. Right now when text is updated, it
auto-scrolls so the most recent text is always shown. I would like to
allow the users to use the scroll-bar to browse backwards through the
saved text, but every time new text comes in the textbox jumps back down
to the new text.

I guess I have two questions then.

1. Is there a property, or message I can send that will make the textbox
only scroll when I want it to?
2. Is there a way to detect the position of the scrollbar? I want to
know if it is at the bottom or not so I can set auto-scroll on or off.

 

[Sergey Bogdanov]

You may control vertical scrollbar by using the WM_VSCROLL message. Here
is small example that demonstrates it:
http://www.sergeybogdanov.com/Samples/TextBoxVScrollBar.zip

Best regards,
Sergey Bogdanov
http://www.sergeybogdanov.com

 

[Russ Ryba]

Thanks Sergey,

I downloaded you example - except that it seems to be an empty shell
program. All I see is a simple form with a textbox that appears to be
entirely created using the Windows Forms Designer.

I'll look up WM_VSCROLL though, thanks for the info.

- Russ

 

[Sergey Bogdanov]

Ouch. I've just updated to correct version.

Best regards,
Sergey Bogdanov
http://www.sergeybogdanov.com

 

[Alex Feinman [MVP]]

Russ,

See if this helps:
http://blog.opennetcf.org/afeinman/PermaLink,guid,7e8df78c-a583-4b35-ae5d-02207210ab40.aspx