So this is for Microsoft Office Infopath 2007 (SharePoint 2007).

The situation is that I started creating a SharePoint List (datasheet) and when I made my form dropdown read from the list, it just put elements in the order that I entered them in the datasheet.

Googling this led me to browse MSDN for an hour before I realised all those experts were using programming solutions that seemed a bit over the top for something that should be so simple.

Hey presto, I found a cheat/workaround:

1. Click on the list to see your datasheet (has a MS Access icon in the top left to remind you what you're getting yourself into)
2. Go to Settings
3. Select Create View
4. Select Datasheet View (you could probably use a "Standard View", I just used the Datasheet one)
5. Give the view a name, select what columns you want the form to have (I included the IDs for functional purposes)
6. Further down the "Create View" page, there should be a Sort section, specify the column to sort by.
7. Save the view by clicking the OK button.

You'll be returned to your datasheet and it's possible it isn't in any different order. I re-checked out my InfoPath form, looked at the dropdown that was already configured to read off the sharepoint list, and it had re-ordered to what I set in the view!!! I don't really understand how it works only that it does. I think this could get complicated if you had two dropdowns reading off the same list but needed to list elements in different orders.