Hi,
I suggest you to create a class that stores the position, the label, the size etc... of each custom controls.
You create an array of objects from that class to store informations of all the custom controls.
Then when the user presses "Save" you serialise it XML or json to save it.
When the user lanch the application, you'll just have to unserialize the xml / json data and create each custom controls.
Chargement...