key 62 MENU WAKE_DROPPED key 63 HOME WAKE key 1 BACK WAKE_DROPPED key 105 DPAD_LEFT WAKE_DROPPED key 106 DPAD_RIGHT WAKE_DROPPED key 108 DPAD_DOWN WAKE_DROPPED key 103 DPAD_UP WAKE_DROPPED key 28 DPAD_CENTER WAKE_DROPPED
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and some more too).
You can screen capture from the Android SDK, which is using ADB to connect to the device. Unfortunately, as Bundyo has mentioned, the 770 is memory constrained, so even trying to connect using ADB is tricky; trying to get the screen capture requires lots of crossed fingers and chanting.