There is an excellent sample to demonstrate this. The sample is provided with SuperCede. Where it ends up depends on where you install SuperCede. Because everything on the CD is compressed, you'll have to make sure you installed the samples. The Form editing window lets you easily place and order controls on the form.
Functionality is identical for windows, dialogs, panels, or panes.
Layout tools help you align your controls, space them properly, and size them equally. I particularly like the option to scale selected controls. If you find you made all the controls a little too small for a particular font, you can enlarge them all by the same percentage, or vice-versa. The source editing pane is a reasonably good text editor, and also functions as the user interface for debugging. You'll want to use it for editing Java form source files because sections of the code are maintained by the form editor and should not be changed.