[Lazarus] how to set two memos for parallel text editing ?

[Martin Frb]

On 28/05/2014 00:46, Etienne Leblois wrote:
> Dear list,
>
> I want to edit two textfiles in a parallel way, so that visible 
> portion of text one in memo1 has always same lines extent as the 
> visible portion of text two in memo2, say lines n1 to n2.
>
> Of course WordWrap must be false, so that one_text_line=one_visible_line
>
> Then, how to manage that scrolling or arrowing up in one memo will 
> also scroll up the other one ? Intercept event yes, but how to 
> issue/code a scrolling order for memo that does not have focus ?

I dont know about TMemo. But with TSynEdit, you can use OnStatusChange