UsbDeregisterNotification: Difference between revisions
Created page with "==Description== Removes the registration of attach/detach notification semaphores. ==Syntax== <pre> ulrc=UsbDeregisterNotification(NotifyID) </pre> ==Parameters== ; NotifyID..." |
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==Syntax== | ==Syntax== | ||
<pre> | <pre> | ||
ulrc=UsbDeregisterNotification(NotifyID) | ulrc = UsbDeregisterNotification(NotifyID) | ||
</pre> | </pre> | ||
==Parameters== | ==Parameters== | ||
; NotifyID : | ; NotifyID : the NotifyID received from UsbChangeNotification or UsbDeviceNotification. | ||
==Return Code== | ==Return Code== | ||
<pre> | |||
0x0000 - NO_ERROR | |||
</pre> | |||
===Errors=== | ===Errors=== | ||
<pre> | |||
0x0006 - ERROR_INVALID_HANDLE | |||
0x001F - ERROR_GEN_FAILURE | |||
0x0057 - ERROR_INVALID_PARAMETER | |||
0x005F - ERROR_INTERRUPT | |||
0x0064 - ERROR_TOO_MANY_SEMAPHORES | |||
0x0067 - ERROR_TOO_MANY_SEM_REQUESTS | |||
0x0069 - ERROR_SEM_OWNER_DIED | |||
0x1B58 - USB_NOT_INIT | |||
0xFF1F - ERROR_GEN_FAILURE | |||
0xFF57 - ERROR_INVALID_PARAMETER | |||
0xFFBB - ERROR_SEM_NOT_FOUND | |||
</pre> | |||
==Remarks== | ==Remarks== | ||
==Example Code== | ==Example Code== | ||
<pre> | <pre> | ||
//Code Snippet - UsbDeregisterNotification | |||
{ | |||
ulrc = UsbDeregisterNotification(NotifyID); | |||
printf("\nUsbDeregisterNotification - ulrc: 0x%04X (%hu)",ulrc,ulrc); | |||
//release semaphores | |||
ulrc = DosCloseEventSem(hDeviceAdded); | |||
printf("\nDosCloseEventSem - ulrc: 0x%04X (%hu)",ulrc,ulrc); | |||
ulrc = DosCloseEventSem(hDeviceRemoved); | |||
printf("\nDosCloseEventSem - ulrc: 0x%04X (%hu)",ulrc,ulrc); | |||
} | |||
</pre> | </pre> | ||
==Related Functions== | ==Related Functions== | ||
* [[UsbRegisterChangeNotification]] | |||
* [[UsbRegisterDeviceNotification]] | |||
[[Category:USBCalls]] | [[Category:USBCalls]] | ||
Latest revision as of 17:25, 12 February 2017
Description
Removes the registration of attach/detach notification semaphores.
Syntax
ulrc = UsbDeregisterNotification(NotifyID)
Parameters
- NotifyID
- the NotifyID received from UsbChangeNotification or UsbDeviceNotification.
Return Code
0x0000 - NO_ERROR
Errors
0x0006 - ERROR_INVALID_HANDLE 0x001F - ERROR_GEN_FAILURE 0x0057 - ERROR_INVALID_PARAMETER 0x005F - ERROR_INTERRUPT 0x0064 - ERROR_TOO_MANY_SEMAPHORES 0x0067 - ERROR_TOO_MANY_SEM_REQUESTS 0x0069 - ERROR_SEM_OWNER_DIED 0x1B58 - USB_NOT_INIT 0xFF1F - ERROR_GEN_FAILURE 0xFF57 - ERROR_INVALID_PARAMETER 0xFFBB - ERROR_SEM_NOT_FOUND
Remarks
Example Code
//Code Snippet - UsbDeregisterNotification
{
ulrc = UsbDeregisterNotification(NotifyID);
printf("\nUsbDeregisterNotification - ulrc: 0x%04X (%hu)",ulrc,ulrc);
//release semaphores
ulrc = DosCloseEventSem(hDeviceAdded);
printf("\nDosCloseEventSem - ulrc: 0x%04X (%hu)",ulrc,ulrc);
ulrc = DosCloseEventSem(hDeviceRemoved);
printf("\nDosCloseEventSem - ulrc: 0x%04X (%hu)",ulrc,ulrc);
}