Module development and code questions

Is it possible to define callbacks for a specific module that can be used by other modules to modify module behaviour.

Specfically, I want to add some callbacks for the project module for creating and deleting modules. I then want to hock into these callbacks in another module (project_svn) to add/delete folders in a subversion repository.

Is this possible?

TIA

I have the following query that works perfectly in phpMyAdmin, but Drupal reports an error at the top of the page. What's weird is the resulting recordset data actually displays correctly within the page, yet Drupal complains nevertheless. Is there a way to satisfy Drupal or suppress the error? I have wasted two hours trying to make Drupal happy and rechecking (and rechecking and rechecking) my syntax. Needless to say this is freakin' annoying.

this gremlin likes to claim nodes, and he won't let you post any attachments to them.

he seems to thrive in environments that include filemanager/attachment modules, though i haven't tried to incubate him in a different setting.

in my case, he likes nodes 12,13,14,16, but he doesn't like nodes 11,15,18

i've studied these nodes in the DB and can't find any sort of patterns. nodes might have single or multiple attachments already (before the gremlin reared his head. they might have no common properties in the database.

Sorry for the bad english. I'm modifing video module. I've inserted a hook_view called video_view() in the code to show an image in the node. But the image is showed only in the node details, not in the preview (in the home page). How can i can show that image added at $node->body also in home page, where nodes are listed? I'm using slash theme in Drupal 4.6.2.

I am currently developing a community portal with Drupal 4.6.2 and was wondering if there was a way to count how many downloads happen with each attachment. I see that there is counting going on for all node types, but I cant seem to a way for attachments. Any help would be appreciated ;-)

Hey...

I'm hoping that someone else has gotten this problem in the past. Whenever i enter all my php and javascript code into my page to display the only thing that shows up on the page for that call back is open/closing html and body tags.

If anyone has been able to get this to happen b4 pllleeeaassseeee hheeeellllllppppp!

As a side note, i'm working with sajax code which might be part of the problem but I really don't know...
~!btopro