>Hi,
>I´m adding an COM Server (DLL) to a form, by this code at run time:
>thisform.addObject('loCir','circuitos.circuito')
>And it gives me exactly this error:
>'Object class is invalid for this container'
>
>The DLL is correctly registered. Custom class is its parent, and only has a few methods.
>What am I doing wrong?
>
>Thanks,
>Ibai

Ibai,
You cannot addobject a COM DLL to a form :

thisform.myCustomProperty = createobject('circuitos.circuito')

Likewise you cannot add objects to containers that are incompatible. ie: You can't add a column to a form or page to grid.
Cetin