In a Delphi XE6 VCL app, the user would like to minimize the main form while leaving all other forms open, so we cannot just minimize the app as would be the default behavior when the user clicks on the minimize button of the app's main form. The current behavior is to minimize the app and see its icon in the taskbar and restoring it works as expected.

I've seen many messages with techniques for other kinds of manipulation of minimization, but not one for this. I've also seen Peter Below recommend against setting the form's WindowState to wsMinimized, but maybe that was only in the context of some other desired result. Just setting the state in OnResize doesn't work because it is called at times other than just when the minimize button is clicked.