fs (ULONG)

Mouse state.

The state of the mouse at the time of the event.

Bit

Description
31-7
Reserved; set to zero.
6
Set if button 3 is down.
5
Set if mouse is moving and button 3 is down.
4
Set if button 2 is down.
3
Set if mouse is moving and button 2 is down.
2
Set if button 1 is down.
1
Set if mouse is moving and button 1 is down.
0
Set if mouse is moving and no buttons are down.

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