[Typo3] Custom Tag typoscript $content

[Mark Gillingham]

The Custom Tag is a wonderful tool for shortcuts and tags. Being naive, 
I'm wondering about what can be returned in a typoscript $content 
variable. For instance, can I create forms in php, attach to an external 
database, and return the result in the $content? Further, if a form were 
created in an include file, what is the variable to set the submit to.

Naive