Hi,

I want to make a solution where I list several people where each people has a "Send Message" button attached to his name. I want to have one dialog where I put a "sendmessage" USERCONTROL.

From each Send Message button I want to provide a "user_id" parameter to the usercontrol inside the dialog's content.

I'm using .net AJAX using updatepanels.

You can create a property on the user control, and set that property in code or inline in the tag- I believe that's what you're looking for, correct?