Starting Programming

Add 1 Command Button to your form (named Command1).

This is how your control will look like.
Your control is the form and everything on it.
We don't want that the control will be a form with a button on it,
we want that the control will be a button only,
without the form around him.
So resize the form to be at the size of the button exactly,
so you won't see the form.

So now the Control look like a button.
But it's not a button, it's a form with button on it.
But what if the user will resize the control at design time
(like you do to Command Button, after you enter it to your form)?

Suppose you have a regular form with a button on it,
and the form is resized to the button size (like in your current control).
When the user will resize the form, he will see the form
that was before 'under' the button.
The same thing will happen in our case.