Re: rotary encoder (hardware): user messages to step through the menu

Hi,

I`ve a custom usb HID interface, which provides the information for
the x86 processor (where the windows embedded app is running) if the
user hits a push button (real hardware) or the rotary encoder wheel
(real hardware no software).

With this user interface, the user should be able to step through the
whole menu (MFC software, running on the x86 processor).

If the user uses the rotary encoder wheel (forward and backward), the
focus should go from menu item one to menu item two for example; and
if the user hits the button (hardware) it should be the same behaviour
as if the user hits the software button with the focus.

Are there specific system-messages to set the focus (for example) from
the first menu item to the second menu item and vica verca - if the
user uses the rotary encoder wheel? From menu item one to menu item
two, it should be the same behaviour as if you press the tab-key on a
keyboard - but which key will let the user go from menu item two to
menu item one?

best regards
Hans