I need to call a procedure/function in VB when my DB is modified
with insert, update or delete. I know that its possible to do
something called Trigger, put how can my Triggers (in SQL Server or
MSDE) call a procedure in VB ?

Just to understand, this database catch information of users
connected to a support chat and I need to know when this user get
logged in (thru the rows of my table). When I notice that a new user
have logged in, I need to support him.

Thanks.

just to clarify soomething,

Trigger gets activated when something happens to the table (form sql server), you don't do it manually.

Therefore, you don't put call trigger in vb.

If i understand you correctly, you want a trigger to call a vb procedure ?

Is the vb app already running ?
When you say "support him", you mean you are using vb to chat ?

I have an idea what you need, i just need a little more information.