Call child form in Delphi?

Question

Delphi

Good afternoon!
People prompt please how to CALL the child form in Delphi. The form is created, you just need to call it.
The following method doesn't suit me at all:
procedure TfrMain.CreateChildForm
(const childName : string);
var Child: TfrChild;
beginChild
:= TfrChild.Create(Application);
Child.Caption := childName;
because this method creates a new form on each click and then calls it, and I need to call My finished form.

Answer 1

Oddly enough, create the form once. And then...
Show - Show.
Hide - Hide.
Make a modal request (the rest of the forms are temporarily unmanaged, we do not exit the function until the window is closed) - ShowModal.