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How to support nullable integer (number) field in Access / VBA

How to support nullable integer (number) field in Access / VBA
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I have run into a dilemma that integer (number) variables in VBA do not seem to support null, but as for a column type in a table, that is allowed to support null.

I recall while developing with the DB2 database, that the DB2 driver / API supported the concept of fields having null indicator variables. That is a second variable that may be checked to find out the null state of the field in question. The correct way to deal with nullable fields on DB2 was to use that second variable, do the null check BEFORE attempting to access the variable which is suppose to contain the value of said field.

Does Access / VBA have anything comparable in ADODB.Recordset objects?

As-is, Access / VBA turns the NULL that was in that field of the record into 0 upon issuing a SQL UPDATE as the Integer variable defaults to 0.
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Field 3 - Text
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Filed 7 - Long Integer
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#Private Sub Text6_DblClick(Cancel As Integer)
Dim db As DAO.Database
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Dim strSQL As String
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Set rst = Nothing
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Below is the syntax I'm using:

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