Ms Access VBA - Trying to call data from a combo box but only if a field is empty

Question

From the code below I want [KronosNO] to come from a database Combo box but only if the [RTWDate] column is Null.

Set Rs = Application.CurrentDb.OpenRecordset(
  "SELECT * FROM tblAbsence WHERE [KronosNo] = '" & Me.cmbKronosNo.Value & "' 
   AND [RTWDate] = '" & "Is Null" & "' ", dbOpenDynaset)

Answer 1

Don't treat Is Null like a variable, it is a part of SQL.

You simply need

AND [RTWDate] Is Null

in your string.