UsbDeregisterNotification
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);
}