[Lazarus] WriteLn back to the GUI

[ListMember]

On 2013-10-23 11:33, Lukasz Sokol wrote:
> On 23/10/13 07:59, ListMember wrote:
>> Hello,
>>
>> I am trying to find where WriteLn is declared; but, apparently,
>> WriteLn is among the select few that Lazarus will ignore 'Find
>> Declaration' requests --at least that's how it behaves (latest
>> Lazarus stable) on my side.
>>
>> My ultimate goal, after finding where it is declared, is to locally
>> modify that part of the sources so that (instead of writing to the
>> console) it will use a global callback to display whatever WriteLn'ed
>> in a TMemo.
>>
>> Or, is there already an alternative to redirect console output to the
>> running GUI?
>>
> DebugLn() ?

I don't really want to alter the sources (which are more than 100 units).

I'd rather find the unit where WriteLn() procedure is defined and alter 
it once and recompile FPC/Lazarus.

But, I just can't locate where WriteLn procedure is defined. I did a 
grep (equivalent in Windows) but came up with nothing usable.