(mozilla-projects-nss-reference-fc-waitforslotevent)=

# FC_WaitForSlotEvent

## [Name](#name)

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FC_WaitForSlotEvent - waits for a slot event, such as token insertion or token removal, to occur.
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## [Syntax](#syntax)

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```{code}
CK_RV FC_WaitForSlotEvent(CK_FLAGS flags, CK_SLOT_ID_PTR pSlot CK_VOID_PTR pReserved);
```

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## [Parameters](#parameters)

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`FC_WaitForSlotEvent` takes three parameters:

`flags`
`pSlot`.
`pReserved`.
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## [Description](#description)

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This function is not supported by the NSS cryptographic module.
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## [Return value](#return_value)

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`FC_WaitForSlotEvent` always returns `CKR_FUNCTION_NOT_SUPPORTED`.
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## [Examples](#examples)

## [See also](#see_also)

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- {ref}`mozilla_projects_nss_reference_fc_waitforslotevent`
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