[TYPO3] FE editing with custom extensions

[Nate Russell]

I have a custom extension that works as a FE Plugin. It just renders a $content variable based on 
what is in custom DB fields.

I would like to be able to the page by using the FE editing feature.

FE Editing is activated and works fine on the site's other pages.

 From searching through the mailing list I could only find one other question similar to this. A 
solution that worked for someone else was to add this:

$markerArray["###EDIT_PANEL###"] = $this->pi_getEditPanel($row,$current_table);

But where? In my *pi1.php code? I'm not even sure this pertains to my kind of extension.

I am having quite a bit of trouble finding concrete info about this. I didn't find any in the guide 
for building extensions.

Could somebody please provide a tip or point me in the right direction?

Thanks in advance,
Nate