GRAPHICBOX COMMANDS
The following commands are sent to a graphicbox. When a graphicbox is disabled, it can no longer capture keyboard and mouse events.

print #handle.ext, "setfocus"
This causes the control to receive the input focus. This means that any keypresses will be directed to the control.

print #handle.ext, "enable"
This causes the control to be enabled.

print #handle.ext, "disable"
This causes the control to be inactive. It can no longer capture mouse and keyboard events.

print #handle, "autoresize"
This causes the edges of the control to maintain their distance from the edges of the overall window.  If the user resizes the window, the graphicbox control also resizes.