KBD_ALTERKBDLED (5Ah) - State of Each LED

State of Each LED

A bit mask indicating the state of the new LED indicators. A set bit means a particular LED is turned on. A clear bit indicates the LED is turned off. The bit mask is defined as follows:

Bits 15-3

Reserved. Set to 0.
Bit 2
If set, Caps Lock LED turned on. If clear, Caps Lock LED turned off.
Bit 1
If set, Num Lock LED turned on. If clear, Num Lock LED turned off.
Bit 0
If set, Scroll Lock LED turned on. If clear, Scroll Lock LED turned off.
If any of the reserved bits are set, an INVALID_PARAMETER error is returned.

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