Extend validation of posts

[Julchen]

Hi,

I fiddled around for hours but I'm stumped

What I'm trying to do is extend the validation of posts and display an error message (if necessary) similar to the 'tooshort' thingy.

In fact, it should look exactly like the page you get when the 'tooshort' error occurs - error message on top (mine will be rather long and comes as a table) and the editor below with a copy of the rejected message.

All I mananged so far is to hook into newreply_post_start and display a 'standard_error'. But that would require the user to return to the previous page after memorizing all the helpful comments. Not so nice

Any hint would be greatly appreciated