Module development and code questions

I've developed a module that allows users to set their availability/location/status which is then displayed on a page with all other users configured to appear there. Basically, it's an intranet style-module that gives a receptionist a page in a Drupal site where he or she can see who's in the office, who's on the road, and who'll be returning later in the day.

The permissions are such that though this is something of intranet-style functionality, it can be used in a public-facing site, with the proper configuration.

hello
As i new to drupla i want to ask u that how can we give link to page by clicking on primary links in drupal

I used the word "account" as in "accounting", I'm not talking about regular drupal user accounts. Here's what I am trying to do :

Users should each have the possibility to add money to their "account".
When they buy products, the total of their order is deducted from their "account".

The reason for this separation between payment and ordering is that the next step is to have a system of comissions, so that if a user you referred (I'm using the user_referral module for this) buys a product then a certain percentage of the price will be added to your account (you will then be able to use it to buy more product or to have it sent to you in the form of a check).

The database tables that would need to be added seem pretty clear to me, I think there is only a need for one table containing different types of transactions (money added manually, comissions, and payments for products with a negative value). I have a little experience developping custom modules, and with other ecommerce modules as examples the task shouldn't be too difficult. However, I am planning to contribute this module back to the community, so I'm interested in doing something that is done the right way and that is compatible with other ecommerce modules rather than having a quick hack that works but it useless to anyone else.

So if you have any suggestions about what I should use (existing modules or methods) or how I should do it, it would be greatly appreciated.

Basically my question is this: what is the proper method for passing needed data through a form preview?

The TAC module has a cool feature where I can limit which categories a person is allowed to tag their content. I want to create a module that just has that feature, but I can't for the life of me figure out how that module does that, so I could create something with Just that feature.

Anyone know?

The TAC module has a cool feature where I can limit which categories a person is allowed to tag their content. I want to create a module that just has that feature, but I can't for the life of me figure out how that module does that, so I could create something with Just that feature.

Anyone know?