Does GetAutoincValue() work ok with Transactions? My program does the following:

BEGIN TRANSACTION
Create an invoice header record
InvoiceKey = GetAutoincValue()
Create a set of invoice line records that include the Invoice Key from above.
If all ok
  END TRANSACTION
else
  ROLLBACK
endif

Is there any problem here if a rollback is done? How does this affect any other users in the system running the same code at the same time?