Thank you Lutz.

>>I used to know this by heart but I forgot all the necessary steps. I know I have it in a book somewhere but still I wanted to ask here because I'm sure it'll be an easy reply for a lot of developers here.
>>
>>So I have a form with a bunch of textboxes for example. I want to change the class of that textbox without having to remove those textboxes from my form and adding the one from the new wanted class.
>>
>>Instead of me hacking manually the required objects do you know if someone developed a tool to do that hacking faster?
>
>I know of no explicit tool
>
>but

>USE your_frx
>
>replace CLASS with ctargett FOR CLASS=='OldCLASS' and BASECLASS='TEXTBOX' 
>use
>compile classlib your_frx
>

>is fast enough