[TYPO3] Extend a existing extension BE form with your own fields

[Jeroen Visser]

I did that off course.

Dmitry Dulepov [typo3] wrote:
> Hi!
> 
> Jeroen Visser wrote:
>> I don't get the expected result in the BE form. I tested it by adding 
>> it directly in the TCA of the extension to expand, nothing happened 
>> ass well.
>>
>> So the question is: How can I add my own fields to the BE form of a 
>> existing extension.
> 
> Clear typo3conf cache.
>