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

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); }

Related Functions

 * UsbRegisterChangeNotification
 * UsbRegisterDeviceNotification