Question : Can't resize form manually

I have a form which I'm trying to manually resize.  I seem to be unable to identify and resize whatever control on this form is keeping me from making it smaller.

Is there any good, reusable way to identify all the controls on a form and figure out what underlying control is preventing all the others from resizing?

Attached picture shows this form in design view and its controls.

Answer : Can't resize form manually

When you say "manually resizing", you mean you're using the sizing handles and trying to drag/move the form? You're not doing this via VBA code?

If so, then you can view every control on the form by selecting that control from the dropdown at the top of the Properties dialog.