8 lines
344 B
Markdown
8 lines
344 B
Markdown
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uid: input-system-monitor-device-state-changes
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---
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# Monitor device state changes
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You can use [`InputState.AddChangeMonitor()`](xref:UnityEngine.InputSystem.LowLevel.InputState) to register a callback to be called whenever the state of a Control changes. The Input System uses the same mechanism to implement [input Actions](actions.md).
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