| Value | Meaning |
|---|---|
| shift4 | |
| ctrl8 | |
| alt256 | not always available on Windows |
| windows512 | ditto |
| capsLock1024 | |
| numLock2048 | |
| leftButtonDown1 | not available on key events |
| middleButtonDown16 | ditto |
| rightButtonDown2 | ditto |
| backButtonDown0x20 | not available on X |
| forwardButtonDown0x40 | ditto |
State of keys on mouse events, especially motion.
Do not trust the actual integer values in this, they are platform-specific. Always use the names.