Form.Release + NIL

Question

if Form.Release is called after using the form, it will free all related memory but not set the form variable to nil.

if not assigned (Form1) then
  begin
    Ap         


        

Answer 1

As is mentioned Release is only a deferred Free for a form to use if it wants to Close/Free itself. Other then being deferred it does nothing different from Release. So there is no use in calling Release in that example. Calling Free seems to be more logical. And you can set it to nil after calling Free or use FreeAndNil.

If you still want to use Release that is fine. Just setting the variable value to nil works. Doing that does not make the forum behave differently. But remember that in this case it is more efficient and more deterministic to call Free instead of Release. My preference is to only use Release where is really needed.