I have a SF maintenance form , and on it, I have a CHildFormDialog called. If I amend the ChildForm twice (i.e. i dont Permanently Save it  the first time, nothing is saved the second time either. I was able to replicate something similar on the ChildDialogueFormSample that comes standard with SF. Following sequence replicates whats happening. (using the ChildDialogueFormSample)

1. Run up the App and  Highlight Akers , Kim  (About half way down the List) and click View CustomerNotes

2. Highlight the second line (Order # 18 Shipped) and click Edit

3. Add 'AAA' after the word Shipped in the Subject Field, and Click Save. It will return to the Parent screen and shows: Order #18 Shipped AAA

4. Hightlight the secondline again (Order # 18 Shipped AAA) , click Edit and add 'BBB' to the end

5. This time..... Hit the Cancel button. It returns to the Parent Screen and the second line says: Order # 18 Shipped AAA

6. Now Click the Save button on the Parent screen to 'Save' the data to the database

If you now bring back the details, Order # 18 Shipped has not been amended with the AAA

Having looked at the Code, there is a CustomerNotes.Undo as part of the Cancel button, whcih I assume Undos the full Editing and reverts back to before 'ANY'  editing AT all has been done . (The List does not seem to be refreshed ,whereas in my live example it is,  as I am using a grid)

I find this a bit confusing and misleading and also you might not want to revert back to the Database status, if you have done a few edits.

Is my interpreation above correct as to whats happening,  and is there a way to Undo just the most recent changes ??

i.e. Ideally , if in the ChildForm and I have saved, but not saved back to the database (from the Parent Form).  If I have another go , using the childform and hit cancel, I would like to revert back to the most recent save on the ChildForm