Terminating modeless forms

I have a main form that shows other forms. Forms are all modeless so you can minimize one and launch another.

I want a way to set a form to Nothing after the user close it

It sounds easy, but i spent a lot of time without a reslut.

Any hint please ?

When you say "close" the form, do you mean unload it? If so and the form is named Form1, put Set Form1 = Nothing in the form's unload event.