This is Windows XP screenshot. I don't remember seeing such UI feature for many years, though I might be mistaken. You can put a notification in the system tray and you can make the form zero size.
thanks erel
I probably didn't explain it clearly
In fact, I want when I minimize the open forms, they are placed at the bottom of the main form of the program, as in the picture, and when I click on them, they return to their original state and size.
In fact, the forms are not closed, they are simply hidden and reappear.
My solution is to add a panel for each form and specify with a label which form each panel belongs to.
Or maybe I should use XCustomListView for better efficiency.
Is there a better solution??