Author: Jonas Bilinkevicius

I have a form with fixed size boxes. I want to prevent the user from overfilling 
it. Is it possible to limit the height or at least the number of lines in a 
TRichEdit?

Answer:

Try keypress code like this:
1   
2   procedure Form1.FMemo1KeyPress(Sender: TObject; var Key: Char);
3   begin
4     if (Key = #13) and ((Sender as TRichEdit).Lines.Count >= 32) then
5       Key := #0;
6   end;