Sub SetRowReadOnly (Byval row As Integer, Byval columnUseMap As String)
   ' Set read-only status for all cells of the row according to the
   ' columnUseMap. Where the map contains " ", that cell is not in use, and
   ' must be read-only.

Function RowToTank (Byval row As Integer) As Integer
   ' Convert ugDevices row number into tank number. This shall be used if and
   ' when we use multiple rows of ugDevices to configure one tank in ugTankCfg.
   ' PRE: 0 <= row < ugDevices.GetNumberRows
   ' POST: 0 <= result < maxNumTanksSupported

Function GetLastNonEmptyTankIndex As Integer
   ' Return the index of the last tank that has at least one device assigned: 0..maxNumTanksSupported-1
   ' If all tanks are empty, then return -1.

Function FindSlaveTankPos (Byval slaveType As String, Byval slaveAddr As Integer) As Integer
' Find the first tank position that contains the slave of type slaveType with
' address slaveAddr. Return the tank position number if found, -1 otherwise.
' slaveType is one of ("REX", "RTG", "PRO", "IDAU", "SDAU", "R2410", "Enraf", "Whessoe"),
' otherwise return -1.
' If (slaveAddr <= 0), then return -1, i. e. don't search for non-existing devices.

Function UpdateSlaveDSFields () As Boolean
' Use data in DataCtx.Variable("POS_DEVICE_ADDR" & Pos) and
' DataCtx.Variable("POS_BUDDY_DEVICE_ADDR" & Pos) to detect slave devices that
' were moved to a new tank position. If there are such devices, use the
' DevCommon.SRF_DS_SETUP (or DevEnraf.csr:SRF_ENRAF_DB_R2460 for Enraf devices)
' to update the slave's DS- and MS-fields. For 2410 tank positions we show a
' warning dialog to make user update their settings.
' Return True if data saved successfully, or False if abort is needed.