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How to get TRichedit to scroll

Posted on 2001-06-25
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165 Views
Last Modified: 2010-04-06
How do I make a richedit control automatically scroll as more lines are added to it?
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Question by:zebada
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5 Comments
 
LVL 44

Expert Comment

by:CrazyOne
ID: 6225692
An easy way to do it would be like this

TRichedit.SelStart := Length(TRichedit.Text);


The Crazy One
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LVL 13

Accepted Solution

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Epsylon earned 50 total points
ID: 6225700
To scroll 3 lines down:

RichEdit1.Perform(EM_LineScroll, 0, 3);


To scroll 3 lines up:

RichEdit1.Perform(EM_LineScroll, 0, -3);
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LVL 13

Expert Comment

by:Epsylon
ID: 6225712
Or

RichEdit1.Perform(EM_Scroll, SB_PAGEDOWN, 0);
RichEdit1.Perform(EM_Scroll, SB_PAGEUP, 0);
RichEdit1.Perform(EM_Scroll, SB_LINEDOWN, 0);
RichEdit1.Perform(EM_Scroll, SB_LINEUP, 0);
0
 
LVL 6

Author Comment

by:zebada
ID: 6230644
CrazyOne,
TRichedit.SelStart := Length(TRichedit.Text);
Doesn't seem to work when I am adding lines to the control in the OnActivate mehtod of the first form that is displayed by the application. i.e. before any user interaction has taken place. After that I don't need to do anything except give the control focus and it will follow (scroll) as I add ne lines.

Epsylon,
Thank-you your solution worked although on reading through some of the other messages I chose the EM_SCROLLCARET because I actually wanted to follow the cursor.
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LVL 13

Expert Comment

by:Epsylon
ID: 6230658
Glad I could help, Thanks.
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