Sendkey?key=X
X may be one of the following numbers:

1 - Main menu
4 - Left
5 - Right
6 - Enter
7 - On/off button
8 - Mute
9 - Volume up
10 - Volume down
11 - Alarm clock
12 - Sleep timer
13 - Language
14 - Screen dim
15 - Channel favourites
17 - Button 0
18 - Button 1
19 - Button 2
20 - Button 3
21 - Button 4
22 - Button 5
23 - Button 6
24 - Button 7
25 - Button 8
26 - Button 9
28 - Mode
30 - Stop
31 - Down
32 - Up
36 - USB
40 - Internet Radio Menu