How can one find their key? of license?

In the past, the license key was presented immediately after the purchase was made in the same browser window where the purchase was completed.  As of this month, in addition to providing the information immediately, an email is now also sent with the license information.

If anyone needs their license information, they should contact support@approximatrix.com, and we should be able to help.

It is hiding a control, not removing it.  Behind the scenes, it is calling the Window's ShowWindow API to cause the control to disappear or reappear.  This feature can be useful if you need to, for example, implement scrolling on a screen with controls.  Rather than destroying them when they scroll out of range, you can instead hide them.  When hidden, the can still be referenced to set/retrieve their values.  Removing/recreating them would be exceptionally tedious as they scrolled into/out of view.

I'll try to get a working example out today.

The latest version of SF 3.30 allows any control to be hidden or displayed programmatically.

"The AppGraphics library has been updated to include visibility subroutines for Windows controls. Any control can now be hidden or shown programmatically, which should improve the ability to build complex user interfaces in Fortran."

I'm not clear on the use of this function.
Is this referring to the "Remove" controls?  If so, removing a control is not the same as hiding it.
Please clarify this function and when possible, please provide a simply example of this functionality?

Thanks,
Frank