Hi! I am new and I am trying to create a combo box. I've looked at the tutorial and several of the previous combo box listing and I can follow what they are stating, but I am struggling when it comes to applying it to my project. The idea is: I have a drop down list of instructors. When a student chooses an instructor, the next box should return all the times the instructor is available to meet with them. Can someone walk me through? Thanks! Tonya
If I understand your problem correctly, you can specify an action in the On Change event of the combobox.

In that action, you can perform whatever action you want.
Using an ajax refresh, you can refresh the part of your screen where the instructors availabilities are show.

Hope it's a bit clear.

Thank you!  Between your post and the one from Hugo (https://www.outsystems.com/NetworkForums/ViewTopic.aspx?TopicId=7866&Topic=-How-I-can-put-Entities-inside-Combo-Box-), I was able to get the combo box to work!