Values
Left
Left mouse button.
MaskLeft
Left mouse button mask.
Right
Right mouse button.
MaskRight
Right mouse button mask.
Middle
Middle mouse button.
WheelUp
Mouse wheel up.
MaskMiddle
Middle mouse button mask.
WheelDown
Mouse wheel down.
WheelLeft
Mouse wheel left button (only present on some mice).
WheelRight
Mouse wheel right button (only present on some mice).
Xbutton1
Extra mouse button 1 (only present on some mice).
Xbutton2
Extra mouse button 2 (only present on some mice).
MaskXbutton1
Extra mouse button 1 mask.
MaskXbutton2
Extra mouse button 2 mask.