Module development and code questions

Just posting a module idea I have been coming back to that combines 2 existing ideas...
1. I really like how the drupal site www.nowpublic.com splits the browser into frames as you click an external link... It keeps you within their site as you browse....
2. I really really like how the browser from www.flock.com allows you to drag and drop text and images from the web as you browse to be added to your blog at any time....

Hi,

I would like to add classifieds ads to a website. How can I do that with drupal ?
Any hints would be greatly appreciated.

Thanks
Thierry

I have been struggling to find the variable that gives a node type in drupal 4.7.

I know that node_get_name($type) gives the name of node type, but how do you get the $type (node type) from the first place? My module has 3 newly defined node types (created in hook_node_info)and I have to differentiate which is chosen by a user. Either $node->type or $node->info didn't give a node type.

Any idea? Many thanks for help in advance.

How do I create a custom filter ?
Do I need to write a new module or does drupal supports creating custom filters on the fly ?
Or better still is there a module that allows creating multiple custom filters ?

thanks

I would overide the normal user creation by checking before a third party usertable and then syncronize them two user accounts data.

I know the password as md5, the user and the email and i would add drupal users with them.
But original user creation function sends an email with random pass.

I installed the video.module but it's not working. I click on create content, then video and I get the following error message:
Fatal error: Call to undefined function: image_prepare() in /home/filmpod/public_html/podcast1/modules/video/plugins/video_image/video_image.module on line 70

I did do the update.php.

What seems to be the problem?

Thank you,